| Free On-line Dictionary of Computing | Acknowledgements | Missing definition |
| ! | !!!Batch | " |
| # | $ | $1 |
| $tonePits | % | & |
| $ | ' | 'Snooze |
| ( | (()) | () |
| (c) | (TM) | ) |
| * | *brainfuck | *LISP |
| *MOD | *w | + |
| ++ | , | - |
| -- | --C-=C-C-- | -oid |
| -ware | .) | .box |
| .com | .cshrc | .env |
| .Gertrude | .git/config | .login |
| .mailrc | .mOdMoDwOrM | .NET |
| .NET framework | .newsrc | .plan |
| .twmrc | .yacuabll | .⍸. |
| / | /actuator/health | /client/get_targets |
| /dev/null | 0 | 0/1 knapsack problem |
| 1 | 100BaseFX | 100BaseT |
| 100BaseTX | 100BaseVG | 100VG-AnyLAN |
| 10base2 | 10base5 | 10baseT |
| 120 reset | 1-2-3 | 1394 |
| 1541 | 1581 | 16000 |
| 16450 | 16550 | 16550A |
| 16650 | 16750C | 16 bit |
| 16-bit application | 16C550 | 16C750 |
| 16C850 | 1802 | 192.168.1.1 |
| 1NF | 1TBS | 1.TR.6 |
| 2 | 20-GATE | 2780 |
| 2B1D | 2B1Q | 2B+D |
| 2NF | 2.PAK | 32000 |
| 3270 | 32-bit application | 3780 |
| 386 | 386BSD | 386SPART.PAR |
| 386SX | 3Com Corporation | 3DNow! |
| 3DNow! Professional | 3DO | 3GL |
| 3NF | 3Station | 3-tier |
| 404 | 4.2BSD | 431A |
| 4.3BSD | 4510 | 473L Query |
| 486 | 486DX | 486SX |
| 4GL | 4NF | 4xx |
| 51forth | 56 kbps | 56k line |
| 586 | 5ESS | 5NF |
| 5th Glove | 6.001 | 610 |
| 6309 | 64-bit | 6501 |
| 6502 | 650x | 6510 |
| 6526 | 65816 | 6800 |
| 68000 | 68020 | 68030 |
| 68040 | 68050 | 68060 |
| 6809 | 680x0 | 686 |
| 68HC11 | 68LC040 | 6to4 |
| 6x86 | 754 | 80186 |
| 80188 | 80/20 rule | 802.1 |
| 802.11a | 802.11b | 802.11g |
| 802.2 | 802.3 | 80286 |
| 8031 | 80386 | 8048 |
| 80486 | 8051 | 8052 |
| 8080 | 8086 | 8088 |
| 80x86 | 822 | 82430FX |
| 82430HX | 82430MX | 82430VX |
| 8250 | 8.3 | 8450 |
| 8514 | 8514-A | 88000 |
| 88open | 8-bit clean | 8N1 |
| 8 queens problem | 8 queens puzzle | 8x86 |
| 90-90 Rule | 9PAC | :-) |
| ; | < | <g> |
| <gr&d> | <label> | = |
| > | ? | ?? |
| @ | @-party | @Begin |
| @stake | @XX | [incr Tcl] |
| \ | \begin | \big |
| \BV | \perp | \sqcap |
| \sqcup | \sqsubseteq | \subseteq |
| \t | \uparrow | \{@} |
| ^ | A# | A-0 |
| a1 | A1 security | A20 handler |
| A-3 | A3D | A4C |
| a56 | AAB8 | AAC |
| AADL | AAL | AAP |
| AAP DTD | aard | AARP |
| AARP probe packets | AAUI | A&B |
| abbrev | Abbreviated Test Language for Avionics Systems | ABC |
| ABC ALGOL | ABCL/1 | ABCL/c+ |
| ABCL/R | ABCL/R2 | abduction |
| ABEND | AberMUD | ABI |
| ABLE | ABM | ABNF |
| abort | ABP | ABR |
| abscissa | ABSET | absolute path |
| absolute pathname | abstract | abstract class |
| abstract data type | abstract interpretation | abstraction |
| abstract machine | Abstract Machine Notation | abstract syntax |
| Abstract Syntax Notation 1 | abstract syntax tree | Abstract-Type and Scheme-Definition Language |
| Abstract Windowing Toolkit | Abstract Window Toolkit | ABSYS |
| AC2 | AC3 | ACA |
| ACAP | Accelerated Graphics Port | accelerator |
| Accent | accept | Acceptable Use Policy |
| acceptance testing | Acceptance, Test Or Launch Language | acceptor |
| Access | Access Control List | access method |
| access permission | access point | access time |
| ACCLAIM | Accounting File | accounting management |
| Account Representative | ACCU | accumulator |
| accuracy | ACE | ACF |
| ACF/NCP | ACIA | ACID |
| ACIS | ACK | ACL |
| ACM | ACME | ACOM |
| acorn | Acorn Archimedes | Acorn Computer Group |
| Acorn Computers Ltd. | Acorn Online Media | Acorn RISC Machine |
| A Coroutine Language | ACOS | acoustic coupler |
| ACP | ACPI | Acrobat |
| acronym | ACSE | ACT |
| ACT++ | Act1 | ACT 1 |
| Act2 | Act3 | Actalk |
| Actis | activation record | active DBMS |
| Active Directory | Active Language I | active matrix display |
| Active Measurement Project | Active Monitor | active object |
| Active Reconfiguring Message | active record pattern | Active Server Pages |
| ActiveX | ActiveX Data Objects | ACT ONE |
| Actor | actor | Actors |
| actor/singer/waiter/webmaster | Actra | actual argument |
| actuator/health | Actus | AD |
| ad | Ada | Ada++ |
| Ada 83 | Ada 95 | Ada 9X |
| ADABAS | Ada Core Technologies | Ada/Ed |
| Adaline | Ada Lovelace | ADAM |
| Adam7 | Adamakegen | ADAMO |
| Adam Osborne | Ada-O | Adaplan |
| Adaplex | Ada Programming Support Environment | ADAPT |
| Adaptable User Interface | Adaptec | adaptive answering |
| Adaptive Communication Environment | Adaptive Digital Pulse Code Modulation | adaptive learning |
| adaptive routing | Adaptive Server Enterprise | Adaptive Simulated Annealing |
| Adaptive TRansform Acoustic Coding | Adaptor | Ada Semantic Interface Specification |
| Ada Software Repository | A Data Management System | ADC |
| ADCCP | A/D converter | ADCU |
| AD/Cycle | ADD 1 TO COBOL GIVING COBOL | ADDD |
| additive | address | address book |
| address bus | addressed call mode | addressee |
| addressing mode | address mask | address resolution |
| Address Resolution Protocol | address space | Address Strobe |
| ADELE | ADES | ad-hockery |
| ad-hoc polymorphism | Aditi | adjacency |
| adjacent | ADL | AdLog |
| ADM | ADMD | admin |
| Administration Management Domain | administrative distance | Administrative Domain |
| admissible | ADO | Adobe Systems, Inc. |
| Adobe Type Manager | ADPCM | ADR |
| ADS | ADSL | ADSP |
| ADSU | ADT | Advanced Audio Coding |
| Advanced Communication Function/Network Control Program | Advanced Communications Function | Advanced Computing Environment |
| Advanced Configuration and Power Interface | Advanced Data Communications Control Protocol | Advanced Encryption Standard |
| Advanced Function Presentation | Advanced Function Printing | Advanced Intelligent Tape |
| Advanced Interactive eXecutive | Advanced Micro Devices, Inc. | Advanced Network Systems Architecture |
| Advanced Peer-to-Peer Networking | Advanced Power Management | Advanced Programmable Interrupt Controller |
| Advanced Program-to-Program Communications | Advanced Research Projects Agency | Advanced Research Projects Agency Network |
| Advanced Revelation | Advanced RISC Computing Specification | Advanced RISC Machine |
| Advanced RISC Machines Ltd. | Advanced SCSI Peripheral Interface | Advanced Software Environment |
| Advanced STatistical Analysis Program | Advanced Technology Attachment | Advanced Technology Attachment Interface with Extensions |
| Advanced Video Coding | Advanced WavEffect | Advantage Gen |
| ADVENT | Adventure Definition Language | ADVSYS |
| adware | AE | ae |
| AED | AEGIS | Aegis |
| Aeolus | AEP | aeroplane rule |
| AES | AESOP | af |
| AFAC | AFAIK | affine transformation |
| affordance | AFIPS | AFJ |
| AFK | aflex | AFNOR |
| AFP | AFS | AFUU |
| ag | agent | aggregate type |
| aggregation | aggregator | AGL |
| AGM Theory for Belief Revision | Agner Krarup Erlang | AGORA |
| AGP | AGP graphics | A Hardware Programming Language |
| AHDL | AHPL | AI |
| ai | AIA | AI-complete |
| AID | AIDA | AIDS |
| AIDX | AIFF | AI International |
| Aiken code | AI koan | AIMACO |
| Aimnet | Aion Development System | AIR |
| AIr MAterial COmmand compiler | airplane rule | AIT |
| AIX | Ajax | AKC |
| AKCL | A. K. Erlang | AKL |
| AL | al | Aladdin Enterprises |
| Aladdin Systems, Inc. | ALADIN | ALAM |
| Alan F. Shugart | A-language | A Language Encouraging Program Hierarchy |
| A Language for Attributed Definitions | A Language with an Extensible Compiler | Alan Kay |
| Alan M. Turing | Alan Shugart | Alan Turing |
| ALARP | A-law | ALC |
| Alcool-90 | ALCOR | Aldat |
| ALDES | ALDiSP | ALEC |
| ALEF | ALEPH | Aleph |
| aleph 0 | alert | Alex |
| Alexis | ALF | Alfl |
| algebra | ALGEBRAIC | algebraic |
| Algebraic Compiler and Translator | algebraic data type | Algebraic Interpretive Dialogue |
| Algebraic Logic Functional language | Algebraic Manipulation Package | Algebraic Specification Language |
| algebraic structure | Algebra of Communicating Processes | ALGOL |
| ALGOL 58 | ALGOL 60 | ALGOL 60 Modified |
| ALGOL 60 Revised | ALGOL 68 | ALGOL 68C |
| ALGOL 68-R | ALGOL 68 Revised | ALGOL 68RS |
| ALGOL 68S | ALGOL C | ALGOL D |
| ALGOL N | ALGOL W | ALGOL X |
| ALGOL Y | algorithim | algorithm |
| ALgorithm DEScription | algorithmic art | ALgorIthmic ASsembly language |
| Algorithmic Language | Algorithmic Model | Algorithmic Processor Description Language |
| Algorithmic Test Case Generation | ALGY | ALIAS |
| alias | aliasing | aliasing bug |
| Alice | alife | A-Life |
| ALJABR | al-Khwarizmi | Allegro |
| all-elbows | ALLIANCE | Allman style |
| allow-none | ALLOY | ALM |
| Aloha | Aloha Net | Alonzo Church |
| ALP | ALPAK | ALPHA |
| Alpha | Alpha AXP 21164 | alpha/beta pruning |
| alphabetic language | alpha conversion | Alpha EV6 |
| Alpha Geek | alphanumeric | alpha particle |
| Alphard | alpha testing | ALPS |
| alt | ALTAC | Altair 8800 |
| Alta Vista | alt bit | ALTER |
| Alternating bit protocol | alternative text | altmode |
| ALTRAN | alt.sources | alt text |
| ALU | Aluminum Book | Alvey |
| AM | am | Amanda |
| A Manufacturing Language | amateur packet radio | Amber |
| AMBIT | AMBIT/G | AMBIT/L |
| AMBIT/S | AMBUSH | AMD |
| AMD 29000 | AMD 29027 | Amdahl |
| Amdahl Corporation | Amdahl's Law | AMD Am2901 |
| AMD Am2903 | AMD Am2910 | AMD K7 |
| American National Standard | American National Standards Institute | American Society of Mechanical Engineers |
| American Standard Code for Information Interchange | American Telephone and Telegraph, Inc. | American Wire Gauge |
| America On-Line, Inc. | America's Multimedia Online | AMI |
| Amiga | Amiga E | Aminet |
| AML | AML/E | AMO |
| Amoeba | AMP | amper |
| Ampere | ampersand | AMPL |
| AMPLE | Amplitude Modulation | amp off |
| AMPPL-II | AMPS | AMS |
| AMTRAN | Amulet | an |
| analog | analog computer | Analog Hardware Design Language |
| analogue | analogue computer | Analogy Model |
| analytical CRM | Analytical Engine | Analytical Machine |
| Analytical Solutions Forum | anchor | ANCP |
| AND | ANDF | Andorra-I |
| Andorra Kernel Language | Andorra-Prolog | Andrei Markov |
| Andrew File System | Andrew Fluegelman | Andrew Message System |
| Andrew Project | Andrew S. Tanenbaum | Andrew Tanenbaum |
| Andrew Toolkit | Andy Tanenbaum | An Evolutionary System for On-line Programming |
| Angel | angle bracket | Anglo-Saxon point |
| angry fruit salad | ANI | Animated GIF |
| animation | Animus | ANL |
| Anna | annealing | annotate |
| ANNotated Ada | annotation | annoybot |
| annoyware | Annual Change Traffic | annulled branch |
| anonymous FTP | ANother Tool for Language Recognition | ANR |
| ANS | ANSA | ANSI |
| ANSI C | ANSI Minimal BASIC | ANSI/SPARC |
| ANSI/SPARC Architecture | ANSI/SPARC model | ANSI X12 |
| ANSI Z39.50 | antenna gain | Anthony Hoare |
| anti-aliasing | antichain | antisymmetric |
| antivirus | antivirus program | antivirus software |
| ANTLR | ANU | ANU ML |
| any key | anytime algorithm | ao |
| AOCE | AOL | AOP |
| AOS | APA | Apache |
| Apache Software Foundation | APAL | APAREL |
| A PArse REquest Language | APC | APDL |
| APE | apE | API |
| APIC | APL | APL2 |
| APLGOL | APLWEB | APM |
| Apollo Computer | apostrophe | app |
| APPC | AppKit | APPLE |
| Apple | Apple Address Resolution Protocol | Apple Attachment Unit Interface |
| Apple Computer, Inc. | Apple II | Apple Macintosh |
| Apple Newton | Apple Open Collaboration Environment | AppleScript |
| Applesoft BASIC | applet | Appletalk |
| AppleTalk Data Stream Protocol | AppleTalk Filing Protocol | apple-touch-icon |
| apple-touch-icon-152x152.png | apple-touch-icon-152x152-precomposed.png | apple-touch-icon-precomposed |
| appletviewer | application | Application Binary Interface |
| Application Configuration Access Protocol | Application Control Architecture | Application Developer |
| application development | application enablement services | Application environment specification |
| Application Executive | Application Integration Architecture | application layer |
| application lifecycle management | Application Portability Architecture | application program |
| Application Program Interface | Application Programming Interface | Application Protocol Data Unit |
| Applications Development Manager | application server | Application Service Element |
| application service provider | applications language | application software |
| Application Software Installation Server | Application-Specific Integrated Circuit | Applications Programming Interface |
| applications software | application testing | Application Visualisation System |
| applicative language | Applicative Language for Digital Signal Processing | applicative order reduction |
| APPLOG | APPN | approximation algorithm |
| April Fool's Joke | A Programming Language | APSE |
| APT | APX III | aq |
| AQL | ar | arbitrary precision calculator |
| ARC | arc | Arcade |
| ArchBSD | archie | Archimedes |
| architecture | Architecture Neutral Distribution Format | archive |
| archive site | ARCnet | ARCS |
| Arctic | arena | ARES |
| AREV | AREXX | arg |
| argument | Argus | Ariel |
| ARI Service | ARITH-MATIC | Arithmetic and Logic Unit |
| arithmetic mean | arity | arj |
| Arjuna | ARL | ARM |
| ARM610 | ARM7 | ARM710 |
| ARM7500 | ARM8 | ARM800 |
| ARM Ltd | ARMM | armour-plated |
| ARP | ARPA | ARPANET |
| ARQ | array | array processor |
| Array Processor Assembly Language | Array Theory | arrow key |
| ART | art | Artemis microkernel |
| Artifex | artificial intelligence | Artificial Intelligence Lab |
| Artificial Life | artificial neural network | Artisoft, Inc. |
| Artistic license | ARTSPEAK | AS |
| as | as31 | AS/400 |
| ASA | asap | asbestos |
| asbestos cork award | asbestos longjohns | ascender |
| ASCI | ASCII | ASCII art |
| ASCIIbetical order | ASCIIbonics | ASCII character table |
| ASCII graphics | ASDIMPL | ASDL |
| ASDO IMPlementation Language | ASE | A* search |
| ASF | ash | Ashmedai |
| Ashton-Tate Corporation | ASIC | Asiliant Technologies |
| A Simulation Process-Oriented Language | ASIS | ASK |
| ASL | ASL+ | As Low As Reasonably Practicable |
| ASM | ASME | ASN |
| ASN.1 | ASP | ASPECT |
| ASpecT | aspect | aspect-oriented programming |
| aspect ratio | ASPEN | ASPI |
| ASPIK | Aspirin | ASPLE |
| ASPOL | ASQC | ASR |
| assembler | ASSEMBLY | assembly code |
| Assembly Language | assembly language | Assembly Language Compiler |
| Assembly Language for Multics | as sensible as a dictionary | assertion |
| ASSET | asset management | Asset Source for Software Engineering Technology |
| assigned numbers | assignment | assignment problem |
| Association Control Service Element | Association for Computational Linguistics | Association for Computing |
| Association for Computing Machinery | Association for Progressive Communications | Association for SIMULA Users |
| Association Française des Utilisateurs d'Unix | Association of American Publishers | Association of C and C++ Users |
| Association of Lisp Users | associative array | associative memory |
| Associative Memory Parallel Processing Language | associativity | AST |
| ASTAP | AST Computers, LLC | asterisk |
| asterix | Astra Digital Radio | Astral |
| AST Research, Inc. | asymmetrical modulation | Asymmetric Digital Subscriber Line |
| Asymmetric Digital Subscriber Loop | asynchronous | Asynchronous Balanced Mode |
| Asynchronous Communications Interface Adapter | asynchronous logic | Asynchronous Transfer Mode |
| asyncronous | AT | at |
| AT-3 | ATA | ATA-2 |
| ATA-4 | Atanasoff-Berry Computer | Atanasoff, John Vincent |
| ATAPI | ATA point | Atari |
| Atari ST | AT Attachment | AT Attachment Packet Interface |
| AT bus architecture | AtFS | Athena |
| Atherton Technology | Athlon | ATIS |
| ATK | ATLAS | Atlas Autocode |
| ATM | ATM Forum | ATMP |
| atob | ATOLL | atomic |
| A Tools Integration Standard | ATRAC | ATS |
| at sign | AT&T | Attachment Unit Interface |
| attacks as a service | AT&T Bell Labs | attenuation |
| atto- | attoparsec | attribute |
| Attributed File System | Attribute Translation System | ATX |
| au | aubergine | audio |
| audiographics | audiographic teleconferencing | Audio IFF |
| AudioOne | Audio Processing Technology | Audio Video Interleave |
| Augmented Backus-Naur Form | AUI | A'UM |
| AUP | Aurora | Austin Kyoto Common Lisp |
| authentication | authoring | autobaud |
| autobogotiphobia | AutoCAD | Autocode |
| AUTOCODER | autoconf | autoconfiscate |
| Autodesk, Inc. | AUTOEXEC.BAT | AUTOGRAF |
| AUTOGRP | Auto Idle | Autolisp |
| autoloader | automagically | automata |
| automata theory | Automated Engineering Design | AUTOmated GRouPing system |
| Automated Retroactive Minimal Moderation | automated testing | AUTOMATH |
| Automatically Programmed Tools | automatic baud rate detection | automatic hyphenation |
| Automatic Mathematical TRANslation | Automatic Network Routing | Automatic Number Identification |
| Automatic Repeat Request | Automatic Send Receive | Automatic Sequence Controlled Calculator |
| automation | Automatische Rechenplanfertigung | automaton |
| Automatrix, Inc. | Autonomous System | Autonomous System Number |
| Autopass | autopilot code | autoprojector |
| AUTO-PROMPT | Autostat | autostereogram |
| A/UX | auxiliary storage | av |
| availability | Avalon/C++ | Avalon/Common LISP |
| avatar | AVC | average seek time |
| AverStar | AVI | Avon |
| AVS | aw | AWE |
| AWG | awk | AWT |
| aXe | AXIOM | axiom |
| AXIOM* | Axiomatic Architecture Description Language | axiomatic semantics |
| axiomatic set theory | Axiom of Choice | Axiom of Comprehension |
| axiom schema | AXLE | ayacc |
| AYT | az | AZERTY |
| B | b | B-0 |
| B1FF | B1 security | B2B |
| B2 security | B3 security | b4 |
| ba | Baan | Babbage |
| Babbage, Charles | babbling error | BABEL |
| BABT | Baby AT | BABYLON |
| BACAIC | Bachman Diagram | Bachman Information Systems |
| backbone | backbone cabal | backbone network |
| backbone site | back door | back-end |
| Back End Generator | Back End Generator Language | background |
| backing store | back link | backoff |
| BackOffice | backplane | backport |
| back-propagation | back quote | backronym |
| backside cache | backslash | backspace |
| backtick | backtracking | backup |
| Backup Domain Controller | backup pumpkin | backup rotation |
| backup software | Backus-Naur Form | Backus Normal Form |
| backward analysis | backward chaining | backward combatability |
| backward compatibility | backward compatible | backwards compatibility |
| backwards compatible | BAD | Bad command or file name |
| Bad Thing | bag on the side | baklava code |
| BAL | balanced computing | balanced tree |
| BALGOL | BALITAC | BALM |
| balun | Banach algebra | Banach inverse mapping theorem |
| Banach space | Banach-Tarski paradox | banana label |
| banana phenomenon | banana problem | bandwidth |
| bang | bang on | bang path |
| banner | Banyan | BAP |
| BAPI | bar | Barbara Liskov |
| bar code | bare metal | barfmail |
| barnacle code | Baroque | baroque |
| barrel shifter | barycentric | base |
| base 64 | baseband | base class |
| baseline | base memory | basename |
| Base Technology | bash | BASIC |
| Basic Assembly Language | BASIC AUTOCODER | Basic COBOL |
| Basic Encoding Rules | Basic Fortran | Basic Input/Output System |
| Basic JOVIAL | Basic Language for Implementation of System Software | Basic Multilingual Plane |
| Basic Object Adapter | Basic Object System | Basic Operating System |
| Basic Programming Support | Basic Rate Interface | Basic Service Set |
| BASIC V | Bastard Operator From Hell | bastion host |
| batch | batch file | batch processing |
| bathtub curve | baud | baud barf |
| Baudot | Baudotbetical order | Baudot code |
| baud rate | bawk | bay |
| baz | bb | BBC |
| BBC Micro | BBC Microcomputer | BBC Networking Club |
| BBL | BBN Butterfly | BBN Technologies |
| bboard | BBS | bc |
| BCBF | BCC | BCD |
| BCL | BC NELIAC | BCNU |
| BCPL | BCS | bd |
| BDC | BDL | BDPA |
| be | BEA | beamer |
| beam search | bean | beanie key |
| bearer channel | bear paw | Beats the shit outa me |
| Bebo | BeBOP | BeBox |
| BEDO | Bedrock | beep |
| beeper | BEG | BEGL |
| beige toaster | Be Inc | BEL |
| belief revision | BELL | Bell |
| bell | Bell 103 | Bell Communications Research, Inc |
| Bellcore | bell curve | Bell Laboratories |
| Bell Labs | bells and whistles | bells, whistles, and gongs |
| benchmark | Bend Over, Here It Comes Again | Benoit B. Mandelbrot |
| Benoit Mandelbrot | Bentley Systems, Inc. | BeOS |
| BER | Berard Object and Class Specifier | Berkeley |
| Berkeley 4.2 | Berkeley EDIF200 | Berkeley FP |
| Berkeley Internet Name Domain | Berkeley Logo | Berkeley Network |
| Berkeley Quality Software | Berkeley Software Design, Inc | Berkeley Software Distribution |
| Berkeley Softworks | Berkeley Unix | Berkeley Yacc |
| berklix | Berners-Lee, Tim | Bernoulli Box |
| Bernoulli principle | Bernstein condition | BERR |
| Bertrand | Bertrand Meyer | Bertrand Russell |
| Berzerkeley | Berzerkley | bespoke |
| best effort | best first search | best fit |
| BETA | beta | beta abstraction |
| beta conversion | Betamaxed | beta reduction |
| beta test | beta testing | beta version |
| Bezier | Bezier curve | Bezier surface |
| bf | BFI | bg |
| BGA | bgh | BGP |
| bh | BHC Code | bi |
| bib | bible | BIBOP |
| BibTeX | BiCapitalisation | BiCMOS |
| bidirectional printing | Bidouilleurs Sans Argent | bi-endian |
| BIFF | biff | Big bag of pages |
| big blue | big-endian | Big Gray Wall |
| big iron | BIG-LAN | Bigloo |
| bignum | bigot | Big Red Switch |
| Big Room | big win | bijection |
| Bill Gates | Bill Joy | binaries |
| binary | binary coded decimal | Binary Compatibility Standard |
| binary counter | binary data | binary exponential backoff |
| binary file | binary large object | binary package |
| binary prefix | binary relation | binary search |
| Binary Synchronous Transmission | binary tree | BIND |
| bindery | binding handle | binding-time analysis |
| BinHex | Binhex 4.0 | BinProlog |
| bioinformatics | BioMeDical Package | biometric device |
| biometrics | BIOR | BIOS |
| BIP | bipartite graph | BIPM |
| bipolar | bipolar transistor | BIPS |
| Bird-Meertens Formalism | Birds Of a Feather | BISDN |
| Bison | Bison++ | BIST |
| bisync | bit | bit bang |
| bit bashing | bitblt | bit bucket |
| bit decay | bit diddling | bite |
| Bit Error Rate | bit field | bitmap |
| bitmap display | bitmap font | bitmapped display |
| bit mask | BITNET | bitonal image |
| bit-paired keyboard | bit pattern | bit plane |
| bit rate | bit-robbing | bit rot |
| bit slice | bits per inch | bits per pixel |
| bits per second | bit string | bit stuffing |
| BitTorrent | bit twiddling | bitty box |
| bitwise | bitwise complement | bixie |
| biz-core stability | bj | Bjarne Stroustrup |
| BJC4000 | black art | black box |
| black-box testing | Black Data Processing Associates | black hat |
| black hole | BlackIce | black magic |
| blargh | blast | blat |
| BLAZE | BLAZE 2 | bleam |
| bleeper | bletcherous | Bletchley Park |
| Blind Carbon Copy | B-LINE | blinkenlights |
| BLISS | BLISS-10 | BLISS-11 |
| BLISS-16C | BLISS-32 | BLISS-36 |
| blit | blitter | blivet |
| bloat | bloatware | BLOB |
| block | Block And List Manipulation | Block Diagram Compiler |
| blocked records | Block Redundancy Check | Block Started by Symbol |
| block-structured | block transfer computations | blog |
| blog-driven development | Bloggs Family, the | Bloombug |
| Blosim | blow an EPROM | blow away |
| blowing your buffer | blow out | blow past |
| blow up | BLOX | BLT |
| Blue | Blue Book | Blue Box |
| blue box | blue dot syndrome | Blue Glue |
| Blue Screen of Death | Blue Screen of Life | Blue Sky Software |
| Bluetooth | blue wire | blurgle |
| bm | BMAN | BMASF |
| BMDP | B-Method | BMF |
| BMP | bmp | BMWF |
| bn | BNC | BNF |
| BNR Pascal | BNR Prolog | bo |
| BOA | boa | board |
| boat anchor | Bob | Bobo the Webmonkey |
| BOCS | Boehm B. | BOEING |
| Boeing Airplane Company Algebraic Interpreter Coding | BOFH | bogometer |
| BogoMips | bogon | bogon filter |
| bogon flux | bogosity | bogo-sort |
| bogotify | bogue out | BOHICA |
| Bohr bug | boink | BOLERO |
| Bolt, Beranek and Newman, Inc. | bomb | bon |
| bondage-and-discipline language | bonk/oif | Booch method |
| book | bookmark | Bookreader |
| book titles | Bookviewer | bool |
| Boolean | Boolean algebra | Boolean logic |
| Boolean search | Boole, George | Booster |
| boot | boot block | boot disk |
| booting | BOOTP | bootstrap |
| bootstrap loader | boot virus | Border Gateway Protocol |
| borf | Borland International, Inc. | Borland Software Corporation |
| BOS | Bose-Chaudhuri-Hocquenghem Code | BOSS |
| bot | botmaster | botnet |
| botnet herder | bottom | BottomFeeder |
| bottom feeder | bottom-unique | bottom-up implementation |
| bottom-up model | bottom-up testing | botwar |
| bounce | bounce message | boundary scan |
| boundary value | boundary value analysis | bounded |
| boundedly complete | bound variable | Bourne Again SHell |
| bournebasic | Bourne shell | boustrophedonic |
| box | boxed comments | boxen |
| Boxer | boxology | Boycott Apple |
| bozotic | BPEL | BPI |
| bpmake | bpp | BPR |
| BPS | bps | BQS |
| br | brace | bracket |
| bracket abstraction | braille | braille display |
| Braille embosser | Braille printer | Brain Aid Prolog |
| brain-damaged | brain-dead | brain dump |
| brain fart | Brainfuck | braino |
| branch | Branch and Hang | branch coverage testing |
| branch delay slot | Branch on Chip Box Full | branch prediction |
| Branch Target Buffer | branch to Fishkill | Brazil |
| BRB | breadcrumbs | breadth-first search |
| break | break-even point | breakpoint |
| break statement | breath-of-life packet | breedle |
| BRH | BRI | Brian Reid |
| BRIDGE | bridge | Bridgetalk |
| briefcase | brightness | Brilliant |
| bring X to its knees | British Broadcasting Corporation | British Library Method |
| British Standards Institute | British Telecom | British Telecom Research Laboratories |
| brittle | broadband | broadcast |
| broadcast quality video | broadcast storm | Broadway |
| brochureware | broken | broken arrow |
| Broken As Designed | broker | broket |
| brontobyte | Brooks's Law | brouter |
| Brouwer Fixed-Point Theorem | Brown and Sharpe Wire Gauge | brown paper bag bug |
| browser | browserconfig.xml | BRS |
| BRUIN | brute force | brute force and ignorance |
| brute force attack | BS | bs |
| BS2000 | BSA | BSD |
| BSD386 | BSDI | BSD/OS |
| BSD Unix | BSI | BSL |
| BSOD | BSOL | BSOM |
| BSP method | BSRAM | BSS |
| BSS segment | BST | bt |
| BTB | btoa | B-Toolkit |
| BTOS | B-tree | BTRIEVE |
| BTRIEVE Technologies, Inc. | BTRL | BTS |
| BTW | BUAF | BUAG |
| bubble memory | bubble sort | bucky bits |
| buffer | buffered write-through | buffer overflow |
| buffer overrun | bug | bug-compatible |
| bug fix | bug fix release | Bugfoot |
| bug-for-bug compatible | buglix | bugs |
| BUGSYS | bug tracking system | Bugzilla |
| build | built-in | Built-in Self Test |
| Bull | bulletin board | bulletin board system |
| bullet-proof | bullet-proof hosting | Bull Information Systems |
| bum | bump | bundle.js |
| burble | Bureau International des Poids et Mesures | Burge's Language |
| buried treasure | burn-in | burn-in period |
| Burroughs Corporation | Burst EDO | Burst Extended Data Out DRAM |
| burst page | Burst Static Random Access Memory | bus |
| bus error | Bush, Vannevar | Business Analyst |
| Business Application Programming Interface | Business Process Re-engineering | Business Software Alliance |
| Business Systems Analyst | business to business | bus master |
| bus mastering | bus network | bus topology |
| Busy Beaver | busy-loop | busy-wait |
| Butterfly Common LISP | Butterfly Scheme | button |
| buzz | bv | bw |
| bwBASIC | BWQ | by |
| byacc | by hand | Byte |
| byte | byte-code | byte-code compiler |
| byte-code interpreter | byte compiler | bytesexual |
| Byzantine | bz | bzzzt, wrong |
| C | C# | C* |
| C++ | C+- | C+@ |
| C-10 | C1 security | c2man |
| C2 security | c386 | C5 |
| C64 | c68 | CA |
| ca | cable modem | cache |
| cache block | cache coherency | cache conflict |
| cache consistency | cache hit | cache line |
| cache memory | cache miss | Cache On A STick |
| caching | CACI | CACM |
| CAD | CAD/CAM | CADD |
| Cadence Design Systems | CADET | CADRE |
| CAE | CAF | CAFE |
| CAGE | CAI | Cairo |
| CAIS | CAIS-A | CAiSE |
| CAJOLE | CAL | Calc |
| calculator | Calculus of Communicating Systems | Calendar API |
| Calendar Application Programming Interface | Caliban | Calico |
| California State University San Marcos | callback | call-by-name |
| call-by-need | call-by-reference | call-by-value |
| call-by-value-result | call/cc | Call Data Record |
| callee | Caller ID | calling convention |
| Call-Level Interface | Call Unix | Callware |
| call-with-current-continuation | CALS | Caltech Intermediate Form |
| CAM | CAM-6 | CAMAL |
| Cambridge Lisp | CamelCase | Camelot Library |
| camera ready | CAMIL | CAML |
| Caml Light | CAM-PC | Campus Wide Information System |
| CAN | Canada | Cancel |
| Cancelbunny | Cancelm00se | Cancelmoose |
| Cancelpoodle | candidate key | Candle |
| candygrammar | canonical | Canonical Encoding Rules |
| canonical name | canonicity | C (ANSI) |
| can't happen | Cantor | CAP |
| Capabilities Maturity Model | capability | Capability Maturity Model |
| capacitor | capacity | CAPI |
| Cap'n Crunch | Captain Abstraction | Captain Crunch |
| CAPTCHA | car | card |
| Cardbox for Windows | Cardbus | card creep |
| cardinality | cardinal number | CARDS |
| card walloper | Career Limiting Move | caret |
| careware | cargo cult programming | Caribou CodeWorks |
| Carl Friedrich Gauss | Carnegie Mellon University | carpal tunnel syndrome |
| carriage return | Carrierless Amplitude/Phase Modulation | carrier pigeon |
| carrier scanner | carrier signal | Cartesian coordinates |
| Cartesian product | CAS | CAS 8051 Assembler |
| cascade | Cascading Style Sheets | CASE |
| case | case and paste | case based reasoning |
| CASE Data Interchange Format | CASE framework | case insensitive |
| Case Integration Services | CASE*Method | case sensitive |
| case sensitivity | CASE SOAP III | case statement |
| CASE tools | cashe | CAST |
| cast | casters-up mode | casting the runes |
| CAT | cat | Cat 3 |
| Cat 5 | catatonic | CATE |
| Categorical Abstract Machine Language | category | Category 3 |
| Category 5 | CA-Telon | cathode ray tube |
| CATIA | cationic cocktail | C/ATLAS |
| CATNIP | CATO | Cauchy sequence |
| cause-effect graphing | CAV | Cayenne Software, Inc. |
| CAYLEY | cb | CBASIC |
| CBBS | C-BC | CBD |
| C Beautifier | CBIR | CBN |
| CBR | CBT | CBV |
| CBVIR | cbw | cc |
| CC++ | C/C++ | CCalc |
| CCD | CCIRN | CCITT |
| CCITT HIgh-Level Language | CCL | CCLU |
| ccmail | cc:mail | CCP |
| CCR | CCS | CCSP |
| CCTA | CD | cd |
| CDA | CD burner | CDC |
| CDC 6600 | CDDI | CDD/Plus |
| CDE | CDF | CD-i |
| CDIF | CDL | CDM |
| CDMA | CDP1802 | CDPD |
| CDR | cdr | CD-Read-Write |
| CD-Rewritable | CD-ROM | CD-ROM drive |
| CD-RW | CDS | cd tilde |
| CDW | CE | Cecil |
| Cedar | CEEMAC+ | CEI-PACT |
| Celeron | CELIP | cell |
| Cellang | CELLAS | Cello |
| cell reference | CELLSIM | CEll Space Simulation Language |
| Cellular | cellular automata | cellular automaton |
| Cellular Digital Packet Data | cellular multiprocessing | Cellular Neural Network |
| CELP | CEN | CENELEC |
| centi-call second | central office | Central office exchange service |
| central processing unit | Centrex | Centronics |
| Centrum voor Wiskunde en Informatica | centum call second | century meltdown |
| CEN/XFS | cepstra | cepstrum |
| CEPT | CER | Ceramic Pin Grid Array |
| Ceres workstation Oberon System | Cerf, Vint | CERN |
| CERNLIB | CERT | Certificate Authority |
| CESP | CESSL | cextract |
| cf | CFD | CFG |
| CFML | cforth | cfortran.h |
| CFP | CFP92 | cg |
| CGA | CGGL | CGI |
| cgi-bin | CGI Joe | CGI program |
| CGI script | CGM | CGOL |
| cgram | Ch | ch |
| chad | chad box | Chadless keypunch |
| chain | Challenge-Handshake Authentication Protocol | Chalmers University of Technology |
| change management | changeover | channel |
| channel associated signaling | channel hopping | channel op |
| channel service unit | channel service unit/data service unit | chan op |
| chaos | CHAP | char |
| character | character encoding | character encoding scheme |
| character graphics | characteristic function | character key |
| character repertoire | character set | character set identifier |
| charge-coupled device | CHARITY | charityware |
| Charles Babbage | Charles Bachman | Charles Simonyi |
| CHARM | CHARM++ | Charme |
| CHARYBDIS | chase pointers | CHASM |
| chat | chatbot | chat room |
| chatterbot | CHeap ASseMbler | cheapernet |
| checkdigit | Checkout Test language | checkpoint |
| checksum | chemist | Chen |
| CHEOPS | Chernobyl packet | chess |
| CHI | Chicago | chicken head |
| chicklet keyboard | chiclet keyboard | Chief Information Officer |
| child | child process | child record |
| child version | CHILI | CHILL |
| Chimera | chine nual | Chinese Army technique |
| CHIP | chip | CHIP-48 |
| CHIP-8 | chip art | chip box |
| chip creep | chip graffiti | Chip Jewelry |
| Chip Scale Packaging | chip set | Chips & Technologies |
| CHISEL | chm | chmod |
| CHOCS | choke | chomp |
| CHOP | Chop | Chorus |
| Christmas tree | Christmas tree packet | Christopher Strachey |
| chromatic number | chrome | chroot |
| CHRP | chug | chug report |
| chunker | Church, Alonzo | Church integer |
| Church of the SubGenius | Church-Rosser Theorem | ci |
| CI$ | CICERO | Cichlid |
| CICS | CID | CIDR |
| CIEL | CIF | CIFS |
| Cigale | CIL | CIM |
| CIMS PL/I | Cinderella Book | CINT92 |
| C-Interp | CIO | ciphertext |
| CIP-L | CIP Language | CIR |
| CIRCAL | circuit | CIRcuit CALculus |
| circuit switch | circuit switched | circuit switching |
| circular buffer | Cirrus Logic | CIS |
| CISC | Cisco Systems, Inc. | CISI |
| CITRAN | CityScape | CIX |
| CJK | CJKV | ck |
| CL | cl | CLAM |
| C Language Integrated Production System | Clarify | Clarion |
| Claris | CLASP | class |
| Class 5 switch | class hierarchy | classic |
| Classic-Ada | classical logic | Classic C |
| Classless Inter-Domain Routing | class library | class method |
| class object | Class Oriented Ring Associated Language | Class-Relation Method |
| Clausal Language | clause | Clean |
| clean | cleanroom | CLEAR |
| clear box testing | Clear Language for Expressing Orders | CLEO |
| CLHEP | CLI | CLiCC |
| click | client | client/get_targets |
| client-server | client/server | Client-Server Analyst Programmer |
| client-server model | Client To Client Protocol | C++Linda |
| C-Linda | CLIP | CLiP |
| clipboard | Clipper | CLIPS |
| clique | CLISP | Clive Sinclair |
| CLIX | CLM | CLNP |
| clobber | clock | clock frequency |
| clock rate | clock speed | clone |
| clone-and-hack coding | clonebot | CLOS |
| close brace | closed-box testing | closed interval |
| closed set | closed term | close parenthesis |
| Clos network | closure | closure conversion |
| cloud | cloud computing | Clover |
| clover key | CLP | CLP* |
| CLP(R) | CLP(sigma*) | CLR |
| CLtL1 | CLtL2 | CLU |
| clu2c | cluster | Cluster 86 |
| clustergeeking | clustering | CLUT |
| CLV | CLX | CM |
| cm | CMA | CMAY |
| CMC | cmd | CMGA |
| CMIP | CMIS | CML |
| CMM | CMOS | CMP |
| CMS | CMS-2 | CMU |
| CMU CL | CMU Common Lisp | CMVC |
| CMYK | CMZ | cn |
| CNAME | CNC | CNET |
| CNI | C|N>K | CNN |
| CNR | CNRI | co |
| CO2 | Coad/Yourdon | COALA |
| coalesced sum | Coalition for Networked Information | coarse grain |
| COAST | coax | coaxial cable |
| COBOL | COBOL-1961 Extended | COBOL fingers |
| COBRA | cobwebsite | Cocktail |
| cocktail shaker sort | CoCo | Cocol |
| Coco Language | Cocol/R | COCOMO |
| Coco/R | CODASYL | Codd's First Normal Form |
| Codd's reduction algorithm | code | Code 2.0 |
| codebook | CODEC | CodeCenter |
| coded character set | Code Division Multiple Access | code division multiplexing |
| Code-Generator Generator Language | code grinder | code management |
| code police | code position | coder/decoder |
| codes | C-odeScript | code segment |
| code walk | codewalker | CODIL |
| codomain | coercion | COFF |
| COGENT | Cogent Prolog | Cognitech |
| cognitive architecture | COGO | Coherent Parallel C |
| COHESION | COIF | CoIP |
| cokebottle | COLASL | COLD |
| cold boot | ColdFusion | ColdFusion Markup Language |
| COLD-K | COLINGO | collision |
| collision detection | collocation | co-location |
| colon | color | Color Graphics Adapter |
| color model | Colossus | colour |
| colour depth | colour look-up table | colour model |
| colour palette | Columbia AppleTalk Package | column |
| Column Address Strobe | COM | com |
| COMAL | combination | combinator |
| combinatory logic | Combined object-oriented Language | Combined Programming Language |
| Comdex | COME FROM | COMIS |
| COMIT | Comité Européen de Normalisation | Comité Européen des Postes et Telecommunications |
| COMIT II | Comma | comma |
| command | Command Control Processor | command interpreter |
| command key | command line interface | command-line interpreter |
| command line option | comma separated values | COMMEN |
| comment | commented out | comment out |
| commercial at | Commercial Internet eXchange | commercial off-the-shelf software |
| commercial software | Commercial Translator | Committed Data Rate |
| Committed Information Rate | comm mode | Commodore |
| Commodore 1010 | Commodore 128 | Commodore 1541 |
| Commodore 1570 | Commodore 1571 | Commodore 1581 |
| Commodore 64 | Commodore 64DX | Commodore 65 |
| Commodore Business Machines | Commodore SX64 | COMmon Algorithmic Language |
| Common Applications Environment | Common Applications Service Element | Common Architecture for Next Generation Internet Protocol |
| COmmon Business Oriented Language | common carrier | Common Command Set |
| Common Communication Services | Common Data Format | Common Desktop Environment |
| Common ESP | Common Gateway Interface | Common Hardware Reference Platform |
| Common Information Model | Common Intermediate Format | Common Intermediate Language |
| Common Internet File System | Common-ISDN-API | Common ISDN Application Programming Interface |
| Common Lisp | Common LISP in Parallel | Common LISP Object System |
| CommonLoops | Common Management Information Protocol | Common Management Information Services |
| Common Object File Format | Common Object Model | Common Object Request Broker Architecture |
| Common Objects | Common Open Software Environment | Common Program Interface |
| Common User Access | Commonwealth Hackish | Communicating Functional Processes |
| Communicating Sequential Processes | Communication and Network Riser | Communications Decency Act |
| Communications of the ACM | communications port | Communications Server |
| communications software | communication system | Community of Massive Gaming Agency |
| COMNET | compact | Compact COBOL |
| Compact Disc | Compact Disc interactive | Compact Disc Read-Only Memory |
| Compact Disc Read-Write | Compact Disc Recordable | Compact Disc Rewritable |
| Compact Disc writer | compaction | compactness preserving |
| Compaq Computer Corporation | Compas Pascal | COMPASS |
| compatibility | compatible | Compatible Timesharing System |
| Compel | Competitive Access Provider | Compiled HTML |
| compiler | COmpiler and GENeralized Translator | compiler compiler |
| Compiler-Compiler | compiler-compiler | compiler jock |
| Compiler Language for Information Processing | Compiler Target Language | compile time |
| COMPL | complement | Complementary Metal Oxide Semiconductor |
| complementary nondeterministic polynomial | complete | complete graph |
| complete inference system | complete lattice | complete metric space |
| completeness | complete partial ordering | complete theory |
| complete unification | Complex Instruction Set Computer | complexity |
| complexity analysis | complexity class | complexity measure |
| complex number | complex programmable logic device | component |
| component architecture | component based development | Component Integration Laboratories |
| Component Object Model | com port | composite |
| composition | Compositional C++ | Compound Document Architecture |
| compound key | COMPREHENSIVE | Comprehensive Perl Archive Network |
| Comprehensive TeX Archive Network | compress | Compressed SLIP |
| compressed video | compression | COMPROSL |
| Compu$erve | Compulink Information eXchange | CompuServe |
| CompuServe Corporation | CompuServe Information Service | CompuServe Interactive Services |
| Compusult Ltd. | computability theory | computable |
| COMputable MAthematics | Computational Adequacy Theorem | computational complexity |
| Computational Fluid Dynamics | computational geometry | computational learning |
| computational molecular biology | COMpute ParallEL | Computer |
| computer | Computer Aided Design | Computer Aided Detector Design |
| Computer Aided Engineering | Computer-Aided Instruction | Computer-Aided Learning |
| Computer Aided Software Engineering | Computer-Aided Software Testing | Computer Aided Test Engineering |
| Computer Animation Movie Language | Computer-Assisted Learning | Computer-Assisted Software Engineering |
| Computer Associates International, Inc. | Computer-Based Training | computer bus |
| Computer Compiler | computer confetti | Computer Conservation Society |
| computer cookie | computer crime | Computer Design Language |
| computer dictionary | Computer Emergency Response Team | computer ethics |
| computer file | computer geek | computer-generated imagery |
| Computer Generation Incorporated | Computer Graphics Metafile | Computer Integrated Manufacturing |
| computer language | Computer Language for AeronauticS and Programming | computer law |
| computer literacy | Computer Management Group of Australia | Computer Mediated Communication |
| computer nerd | computer network | Computer Output on Microfilm |
| Computer Output to Laser Disc | Computer Output to Laser Disk | Computer Professionals for Social Responsibility |
| computer program | computer programming language | Computer + Science NETwork |
| computer security | computer sex | Computer Software Configuration Item |
| Computer-Supported Collaborative Learning | Computer Supported Cooperative Work | Computer Telephone Integration |
| Computer Telephony | Computer Telephony Integration | computer virus |
| computer vision | compute server | computing |
| Computing Devices Canada Ltd. | computing dictionary | computron |
| Compuware Corporation | COMSL | COMTRAN |
| ConC | concatenate | concatenated key |
| concentrator | conceptualisation | Concert/C |
| ConCoord | concrete class | Concrete Data Structure |
| concrete syntax | CONCUR | concurrency |
| Concurrent C | Concurrent C++ | Concurrent Clean |
| Concurrent CLU | Concurrent Constraint Programming | Concurrent Euclid |
| Concurrent LISP | Concurrent Massey Hope | Concurrent ML |
| Concurrent Oberon | Concurrent Object-Oriented C | Concurrent Object-Oriented Language |
| Concurrent Pascal | concurrent processing | Concurrent Prolog |
| Concurrent Scheme | ConcurrentSmalltalk | Concurrent SP/k |
| Concurrent Versions System | condela | condition out |
| condom | Conference On DAta SYstems Languages | Conferencing over IP |
| confidence test | CONFIG.SYS | configuraholic |
| configuration item | configuration management | configuration programming |
| configure | conflation | congestion |
| CONIC | conjunction | Conjunctive Normal Form |
| connect | connected graph | connected subgraph |
| Connection Definition Language | connectionless protocol | Connection Machine LISP |
| connection-oriented | connection-oriented network service | connective |
| connector conspiracy | CONNIVER | Co-NP |
| CONS | cons | cons cell |
| conservative evaluation | considered harmful | consistently complete |
| console | console jockey | consortium |
| Consortium for Lexical Research | constant angular velocity | constant applicative form |
| constant folding | Constantine/Yourdon | constant linear velocity |
| constant mapping | constraint | constraint functional programming |
| Constraint Handling In Prolog | ConstraintLisp | Constraint Logic Programming |
| CONSTRAINTS | constraint satisfaction | constructed type |
| Constructive Cost Model | constructive proof | constructive solid geometry |
| constructor | Consul | consultant |
| container class | content addressable memory | content-based information retrieval |
| content-based visual information retrieval | Content Data Model | content-free |
| contention slot | Contents of Address part of Register | Contents of Decrement part of Register |
| context | context clash | COntext Dependent Information Language |
| context-free grammar | context-sensitive menu | context switch |
| Contextually Communicating Sequential Processes | continental drift | continuation |
| Continuation Passing Style | continuation passing style | continuations |
| continuous function | Continuous System Modeling Program | Continuous System Simulation Language |
| continuous wave | contraction | contract programmer |
| control | Control and Status Register | control bus |
| control-C | control character | control code |
| control flow | control-G | control key |
| Control Language | COntrolled Working SpacE Language | controller |
| control-O | Control Program | Control Program for Microcomputers |
| control-Q | control-S | control structure |
| control tty | control unit | conventional memory |
| converged network | Convergent Technologies | Convergent Technologies Operating System |
| Conversational LISP | Conversational Monitor System | converse |
| conversion to iteration | CONVERT | convert.f90 |
| Convex Computer Corporation | convex hull | Conway, John Horton |
| Conway's Game of Life | Conway's Law | Conway's Life |
| cooC | cooccurrence matrix | cookbook |
| cooked mode | cookie | cookie bear |
| cookie file | cookie jar | cookie monster |
| cooky | COOL | CooL |
| COOL:Gen | Cooperation for Open Systems Interconnection Networking in Europe | Co-operative Development Environment |
| Cooperative Information System | cooperative multitasking | coordinate |
| Coordinated Universal Time | Coordinating Committee for Intercontinental Research Networks | coordination language |
| copious free time | copper | Copper Distributed Data Interface |
| coprocessor | copy and paste | copybook |
| copybroke | copying garbage collection | copyleft |
| copy member | copy module | copy protection |
| copyright | copyright symbol | copywronged |
| CORAL | CORAL 66 | CORBA |
| CORBIE | CORC | core |
| core cancer | core dump | core gateway |
| Corel Corporation | core leak | Corel VENTURA |
| Core Protocol Stack | Core War | corge |
| CORnell Compiler | Cornell List Processor | Cornell Theory Center |
| Cornell University | Coroutine Pascal | Corporation for National Research Initiatives |
| Corporation for Open Systems | Corporation for Research and Educational Networking | CORREGATE |
| Correlatives and Conversions | Cortex | CORTL |
| COS | COSE | COSINE |
| cosmic rays | COSS | cost control callback |
| Cost Driver Attribute | Cost/Schedule Control System Criteria | COTS |
| Cougar | cough and die | count |
| countable | countably many | counted |
| counterbug | country code | coupling |
| Course Author Language | courseware | Coursewriter III |
| cowboy | COWSEL | CP |
| CPAN | CParaOps5 | CPE |
| CPGA | CPI | CPL |
| CPLD | CPM | CP/M |
| cpo | cpp | cppp |
| C preprocessor | C Programmer's Disease | C-Prolog |
| cproto | CPS | CPSR |
| CPU | CPU Info Center | CPU time |
| CPU Wars | CR | cr |
| cracker | cracking | crack root |
| crank | crapplet | CrApTeX |
| crash | crash and burn | crawler |
| crawling horror | Cray instability | crayola |
| crayola books | crayon | Cray Research, Inc. |
| CRC | creationism | creeping elegance |
| creeping featurism | creeping featuritis | C-Refine |
| CREN | CREW PRAM | crippleware |
| criptography | Crisis Software | CRISP |
| crisp | Crispy Critters | critical mass |
| critical section | CRL | CRLF |
| CRM | crock | cron |
| cross-assembler | cross-compiler | cross-platform |
| cross-post | cross software | CROSSTABS |
| crosstalk | CROW PRAM | CRT |
| CRUD | crudware | cruft |
| crufted | cruft together | crumb |
| crunch | cruncha cruncha cruncha | crunchy |
| cryppie | crypt | cryptanalysis |
| Crypt Breakers Workbench | cryptography | CryptoLocker |
| cryptology | Crystal | CS-4 |
| C-Scheme | CSCI | C/SCSC |
| CSCW | CSG | CSG-tree |
| csh | C-sharp | C shell |
| CSID | C++SIM | CSK Corporation |
| CSK Software | CSL | CSLIP |
| CSM | CSMA/CD | CSMP |
| CSNET | CSO | C=S;O=A |
| CSP | CSP/80 | CS/PCode |
| CSP/k | CS-Prolog | CSPS |
| CSP-S | CS/QCode | CSR |
| CSS | CSSA | CSS/II |
| CSSL | CSTools | CSU |
| CSU/DSU | CSV | CT |
| CTC | CTC++ | CTCP |
| CTI | CTL | CTOS |
| ctrl | CTS | CTSS |
| CTY | CU | cu |
| CUA | Cube | cube |
| cubing | CUCH | Cuckoo's Egg |
| CUL | Culler-Fried System | CUPID |
| CUPL | curly bracket | current |
| curried function | currying | curseperl |
| curses | cursor | cursor dipped in X |
| CU-SeeMe | CUSI | cuspy |
| custom | Customer Information Control System | Customer Information Systems |
| Customer Interaction Software | Customer Relationship Management | CUT |
| cut and paste | cut-and-waste code | cut a tape |
| cutover | cut-through switching | cv |
| c/version.js | CVS | CW |
| CWeb | CWI | CWIC |
| CWIS | C with Classes | cx |
| cxref | cy | Cy486SLC |
| cyber | cyberbunny | cyberchondriac |
| cybercrime | cybercrime as a service | cybercrud |
| CyberGlove | cybernetics | cyberpunk |
| cyberrhea | cybersex | cyberspace |
| cyberspastic | cyber-squatting | CyberWand |
| CyberZine | CYBIL | Cyc |
| CYCL | cycle | cyclebabble |
| cycle crunch | cycle drought | cycle of reincarnation |
| cycle server | cyclic redundancy check | cyclic redundancy code |
| Cyclo | cyclomatic complexity | Cygnus Tcl Tools |
| cylinder | CypherText | Cyrix |
| Cyrix 6x86 | cz | D |
| D-1000 | DAA | DAC |
| DACAPO | DACNOS | D/A converter |
| DACTL | DADS | daemon |
| DAG | Daisy | DAISY 201 |
| daisy chain | daisywheel printer | dancing frog |
| dangling pointer | DANTE | DAP Fortran |
| DAPLEX | DARE | dark-side hacker |
| Darms | DARPA | Dartmouth BASIC |
| Darwin | DAS | DASD |
| DASE | DASL | DAT |
| data | data abstraction | data acquisition |
| Data Address Generator | database | database administrator |
| database analyst | database machine | database management system |
| database manager | database normalisation | database query language |
| database server | database transaction | Data/BASIC |
| DATABUS | data bus | datacenter manager |
| data channel | DATACODE I | Datacom |
| Data Communication Equipment | data communications analyst | Data Communications Equipment |
| data compression | Data definition language | data dictionary |
| data dictionary file | data driven | Data Driven Machine |
| Data Encryption Algorithm | Data Encryption Key | Data Encryption Standard |
| data feed | data flow | data flow analysis |
| Data Flow Diagram | data fork | data frame |
| Data General | Data General mN601 | data glove |
| datagram | data hierarchy | data integrity |
| Data Interchange Standards Association | Data Jack | Datakit |
| Dataless Management Services | dataless management utility | Data Link Connection Identifier |
| data link layer | data link level | Data Link Provider Interface |
| Data Link Switching | data logger | data logging |
| Data Management Language | Data Manipulation Language | data mart |
| Datamatic Corporation | Datamation | data mining |
| data model | data modeling | data modelling |
| Data Over Cable Service Interface Specification | Data Over Cable Systems Interface Specifications | data packet |
| Dataparallel-C | Data Parallel Haskell | data path |
| Dataphone Digital Service | DataPoint | data processing |
| Data Protection Act | data rate | data redundancy |
| data segment | data service unit | data set |
| data set organization | DataStage | data storage |
| Datastorm Technologies, Inc. | data striping | data structure |
| Data Structure Diagram | Data Structures Language | Data Terminal Equipment |
| Data Terminal Ready | DATA-TEXT | data transfer |
| data transfer rate | DATATRIEVE | Datatron 200 series |
| data type | DataViews | DataVis |
| data warehouse | data warehousing | date |
| DAU | daughter | daughterboard |
| daughtercard | David Turner | day mode |
| DAZIX | DB | DB2 |
| DB-25 | DB2 catalog | DBA |
| dBASE | DBC | DBCS |
| dBFAST | DBH | DBMS |
| DBPL | DBRI | dbx |
| dBXL | DC | DC1 |
| DC2 | DC3 | DC4 |
| DCA | DCAC | DCALGOL |
| DCC | DCDL | DCE |
| DCG | DCI | DCL |
| DCOM | DCP | D. C. Power Lab |
| DCS | DCT | DD |
| dd | DDB | DDCMP |
| DDE | DDE Manager | DDIF |
| DDL | DDM | DDN |
| DDO | DDoS | DDP |
| DDR | DDR-RAM | DDR-SDRAM |
| DDS | DDT | DDW |
| de | DE-9 | DEA |
| DEACON | dead | DEADBEEF |
| dead code | dead code elimination | dead-drop |
| deadlock | deadly embrace | dead tree |
| dead tree edition | deamon | death code |
| Death Star | deb | Debbugs |
| Debian | Debian GNU/Hurd | Debian GNU/Linux |
| debianize | deboursification | De Bruijn graph |
| De Bruijn notation | DEBUG | debugger |
| debugging | debugging an empty file | debugging by printf |
| debugging tool | DEC | dec |
| DEC Alpha | decay | DECdesign |
| DECdns | DEChead | dechunker |
| decidability | decidable | decimal point |
| decision problem | decision support | decision support database |
| Decision Support Systems | decision theory | deckle |
| declarative language | DECmate I | DECnet |
| decode | Decomposed Petri Net | decompress |
| decorated name | decrement operator | decryption |
| DECstation | DECT | DECtape |
| DECUS | Decus cpp | DEC Wars |
| DECwindows | DECwrite | DED |
| dedicated line | deductive database | deductive tableau |
| Deep Blue | deep hack mode | deep magic |
| deep space | de facto standard | default |
| default.htm | default route | defect |
| defect analysis | defect density | Defense Advanced Research Project Agency |
| Defense Advanced Research Projects Agency | Defense Calculator | Defense Communications Agency |
| Defense Data Network | Defense Data Network Network Information Center | Defense Information Systems Agency |
| Defense Trade Regulations | deferral | definite clause |
| definite sentence | definitional constraint programming | deflate |
| deflate compression | deflate/inflate compression | deforestation |
| defrag | defragment | defunct process |
| degree | degrees of freedom | dehose |
| DEK | Delaunay triangulation | delayed control-transfer |
| delay instruction | delay slot | delete |
| delimiter | delint | Delirium |
| Delivered Source Instruction | Dell Computer Corporation | Delphi |
| Delphi Technique | Delta | delta |
| Delta-4 | delta conversion | Delta-Prolog |
| delta reduction | DELTASE | demand driven |
| demand paged | demand paging | DeMarco |
| DeMarco/Yourdon | demented | Demeter |
| demigod | De-Militarised Zone | demo |
| demodulate | demodulation | demo mode |
| demon | Demon Internet Ltd. | DeMorgan's theorem |
| demo version | Denis Howe | Dennis Ritchie |
| denotational semantics | Denotational Semantics Language | Department of Defense |
| Department of Defense Network | depeditate | dependability |
| dependable software | Deployment Descriptor | deprecated |
| depth-first search | deque | dequeue |
| DER | dereference | de-rezz |
| derived class | derived type | DES |
| descender | descent function | Descriptive Intermediate Attributed Notation for Ada |
| Descriptive Top-Level Specification | descriptor | design |
| Design In Real Time | design pattern | design recovery |
| Design System language | desk check | desktop |
| desktop database | Desktop Management Interface | Desktop Management Task Force |
| desktop manager | desktop publisher | desktop publishing |
| DESQview | destructor | DESY |
| DETAB | deterministic | deterministic automaton |
| DETOL | developer | development |
| Developmental Test and Evaluation | development environment | device |
| Device Control | Device Control 1 | Device Control 2 |
| Device Control 3 | Device Control 4 | device driver |
| device independent bitmap | Device Manager | Devil Book |
| devo | DEX | DFA |
| DFC | DFD | D-Flat |
| DFS | DFT | DGL |
| DG/L | DHCP | Dhrystone |
| DHSD | DHTML | Dialled Number Identification Service |
| DIALOG | dialup | DIAMAG |
| diameter | Diamond | DIANA |
| DIB | DIBOL | dickless workstation |
| Dick Size War | DICOM | dictionary |
| Dictionary APL | dictionary flame | Dictionary of Algorithms and Data Structures |
| Dictionary of Computing | DID | diddle |
| Didot point | die | die horribly |
| diff | Difference Engine | difference equation |
| differential backup | differential driver | differential line |
| Diffie-Hellman | digerati | digest |
| Digex | DigiCash | Digicom |
| digirati | digit | Digital |
| digital | digital audio | Digital Audio Tape |
| digital camera | digital carrier | digital certificate |
| digital computer | Digital Control System | digital dashboard |
| Digital Data Service | digital electronics | Digital Enhanced Cordless Telecommunications |
| digital envelope | Digital Equipment Computer Users Society | Digital Equipment Corporation |
| Digital Equipment Corporation Network | Digital European Cordless Telecommunications | Digital Express Group, Inc. |
| Digital Lempel Ziv 1 | Digital Library Initiative | Digital Linear Tape |
| digital logic | Digital Multimeter | Digital Radio Mondiale |
| Digital Research | Digital Rights Management | digital service unit |
| Digital Signal Processing | Digital Signal Processing Language | digital signature |
| digital signatures | Digital Signature Standard | Digital Simulation Language |
| Digital Simultaneous Voice and Data | DIGITAL Standard MUMPS | Digital Subscriber Line |
| Digital Subscriber Line Access Module | Digital Subscriber Loop | Digital Switched Network |
| Digital to Analog Converter | Digital Versatile Disc | Digital Versatile Disk Random Access Memory |
| Digital Video Disc | Dijkstra's guarded command language | dike |
| DIL | Dilbert | Dilberted |
| DIM | DIMATE | DIMM |
| DIM statement | DIN | DIN-8 |
| ding | Dining Philosophers Problem | dink |
| DinnerBell | DINO | dinosaur |
| dinosaur pen | dinosaurs mating | diode |
| Diophantine equation | DIP | diplex |
| DIPP | Direct-Access Storage Device | Direct Client to Client Protocol |
| Direct Connection | directed acyclic graph | directed graph |
| Directed Oc | directed set | Direct Inward Dialing |
| directional coupler | Directly Executable Test Oriented Language | direct mapped cache |
| Direct Memory Access | directories | directory |
| Directory Access Protocol | directory service | Directory System Agent |
| Directory User Agent | DirectX | DIRFT |
| Dirt | dirtball | dirty power |
| dis | DISA | disaster planning |
| disaster recovery | disc | disc drive |
| disclaimer | disconnect | Discordianism |
| discrete | discrete cosine transform | discrete Fourier transform |
| discrete preorder | discriminated union | discussion group |
| Disiple | disjoint union | Disjunctive Normal Form |
| disk | disk controller | disk drive |
| disk duplexing | diskette | disk farm |
| diskless workstation | disk mirroring | Disk Operating System |
| disk operating system | disks | disk striping |
| Dislang | disman | display |
| display hack | Display PostScript | Display Screen Equipment |
| display standard | display standards | display terminal |
| Dissociated Press | distfix | Distinguished Encoding Rules |
| Distributed Component Object Model | Distributed Computing Environment | distributed database |
| Distributed Data Management | distributed data warehouse | Distributed Denial of Service |
| Distributed Eiffel | Distributed Logic Programming | Distributed Management Environment |
| distributed memory | Distributed Network Operating System | Distributed Operating Multi Access Interactive Network |
| Distributed Processes | Distributed Queue Dual Bus | Distributed Smalltalk |
| distributed system | distributed systems | distribution |
| distributive lattice | disusered | dithering |
| Ditto Drive | diverge | divisor |
| dj | DJGPP | DjVu |
| DK | dk | DL/1 |
| DLC | DLCI | DLE |
| DLG | DL/I | DLL |
| DLM | DLP | DLPI |
| DLSw | DLT | DLUR/DLUS |
| DLZ1 | dm | DMA |
| DMAD | dmake | DMALGOL |
| DME | DMI | DML |
| DMM | DMS | DMTF |
| DMU | DMZ | DNA computing |
| DNF | DNIS | DNIX |
| DNOS | DNS | do |
| DOA | Doc | doc |
| docking station | DOCMaker | doco |
| DOCSIS | doctype decoration | document |
| documentation | Document Examiner | Document Image Processing |
| Document Object Model | Document Style Semantics and Specification Language | Document Type Definition |
| DOCUS | DoD | DoD-1 |
| dodgy | DOD-STD-2167A | DoD-STD-2168 |
| DOE | DOF | dog |
| dogcow | dogfood | dogfooding |
| dogpile | dogwash | Do It Right the First Time |
| Dojo | DOL | dollar |
| do loop | DOM | domain |
| domain address | Domain Analysis | domain architecture |
| Domain Architecture Model | domain calculus | domain driven design |
| domain engineering | domain handle | domainist |
| domain maturity | domain model | domain name |
| Domain Name Server | Domain Name System | domain selection |
| Domain Software Engineering Environment | domain-specific language | domain squatter |
| domain theory | Domestic Communications Assistance Center | DOMF |
| Donald Knuth | dongle | dongle cracker |
| dongle-disk | Don't do that then! | donuts |
| Dooced | DOOM | DOORS |
| doorstop | Dorito Syndrome | DORUM |
| DOS | DOS/360 | DOS Protected Mode Interface |
| DOS requester | dot | dot address |
| dot com | dotenv | dot file |
| dot leaders | dot matrix printer | dot notation |
| dot pitch | dotted pair | dotted quad |
| double bucky | double-click | Double Data Rate Random Access Memory |
| Double Data Rate Synchronous Random Access Memory | double DECkers | double density |
| doubled sig | double-duplex | double-ended queue |
| double quote | doubly linked list | DOUGLAS |
| Douglas Engelbart | Doug Lenat | DOW COMPILER |
| Do What the Fuck You Want to Public License | do while | down |
| download | downloading | downsizing |
| downstream | down-time | downward closed |
| Downy cocktail | DP | DPA |
| DPB | DPer | dpi |
| DPL | DPL-82 | DPLL |
| DPMI | DPMS | DPN |
| DPP | d-Prolog | DPS |
| DPS-6 | dpSather | DPSK |
| DQDB | draco | Draft Once ReUse Many |
| drag | drag and drop | dragging |
| drag-n-drop | DRAGON | dragon |
| Dragon Book | DRAGOON | drain |
| DRAM | DRAM refresh | Drawing eXchange Format |
| dread high bit disease | DREAM 6800 | DRECNET |
| drill down | drill-down analysis | drive |
| drive-by download | drivers | Dr. James H. Clark |
| DRM | droid | DROOL |
| drool-proof paper | drop cable | drop-down list |
| drop-down menu | drop-ins | drop on the floor |
| drop-outs | DrScheme | DRUCO I |
| drugged | drug report | drum |
| drunk mouse syndrome | dry run | DS0 |
| DS1 | DS1C | DS2 |
| DS3 | DSA | DSDM |
| DSE | DSEE | D-shell connector |
| DSI | DSL | DSLAM |
| DS level | DSM | DSN |
| DSO | DSORG | DSP |
| DSP32 Assembly Language | DSP56000 | DSP56001 |
| dsp56165-gcc | dsp56k-gcc | DSP/C |
| DSPL | DSR | DSS |
| DSSSL | DST | DSU |
| DSVD | DSW | DTALGOL |
| DTD | DTE | DT&E |
| DTLS | DTMF | DTP |
| DTR | DTS | DTSS |
| D-type | D-type flip-flop | du |
| DUA | dual | DUAL-607 |
| dual-attached | dual boot | dual-homed |
| Dual In-Line | Dual In-line Memory Module | Dual In-Line Package |
| dual ported | dual-stack | Dual Tone Multi Frequency |
| duck typing | DUEL | duff |
| Duff's device | dumbed down | dumb terminal |
| dump | dumpster diving | Dungeon |
| dup killer | duplex | Duplex High Speed Data |
| dup loop | Durra | dusty deck |
| DV cartridge | DVD | DVD-R |
| DVD-RAM | DVD-ROM | DVI |
| Dvorak | Dwarf Storage Unit | DWDM |
| dweeb | dwg | DWIM |
| DX4 | DXF | dyadic |
| Dyadic Systems Limited | Dyalog APL | Dyalog Limited |
| DYANA | Dylan | Dylperl |
| dynamic adaptive routing | Dynamic Address Translation | Dynamically Linked Library |
| dynamically scoped | dynamically typed | dynamic analysis |
| dynamic binding | dynamic database management system | Dynamic Data Exchange |
| Dynamic Data Linking | dynamic DBMS | Dynamic Drive Overlay |
| Dynamic Execution | Dynamic Host Configuration Protocol | Dynamic HTML |
| DYnamic LANguage | dynamic link | dynamic link library |
| Dynamic Object-Oriented Requirements System | dynamic RAM | dynamic random-access memory |
| dynamic routing | DYnamics ANAlyzer | dynamic scope |
| dynamic scoping | Dynamic Systems Development Method | dynamic translation |
| dynamic typing | DYNAMO | Dynix |
| Dynix Automated Library Systems | dynner | DYSAC |
| DYSTAL | dz | E |
| E1 | E2 | E2ES |
| E3 | E4 | E5 |
| E-acute | EAF | EAG |
| eager evaluation | Eagle | EAI |
| EAPROM | earliest deadline first | Early PL/I |
| EARN | EAROM | earthquake |
| Ease | EASE II | EASIAC |
| EAST | easter egg | Easter egging |
| Eastern Washington University | EASY FOX | eat flaming death |
| eating one's own dogfood | eating your own dogfood | EAX |
| EBASIC | EBCDIC | EBCIDIC |
| EBNF | Ebone | ec |
| EC++ | ECAP II | E-carrier system |
| Ecash | ECC | Eccles-Jordan circuit |
| Echidna | echo | echo cancellation |
| ECHT | ECIP2 | ECIS |
| Eckert-Mauchly Computer Corporation | ECL | ECLIPSE |
| ECM | ECMA | ECMA International |
| ECMAScript | Ecole Normale Superieure | e-commerce |
| Econet | ECOOP | ECP |
| ECRC | ECRC-Prolog | ECSL |
| ECSP | ECSS II | ECSSL |
| ed | EDA | EDAC |
| e-ddress | Eden | Eden Prairie |
| Eden Programming Language | EDF | EDI |
| EDI analyst | EDIF | EDIFACT |
| Edinburgh Multi Access System | Edinburgh Prolog | Edinburgh SML |
| Edison | edit | editor |
| EDL | EDM | EdML |
| EDMS | Ed Nather | EDO DRAM |
| EDO memory | EDO RAM | EDP |
| EDP auditor | EDRAM | EDS |
| EDS+ | EDSAC | edu |
| education contact | edutainment | Edward Lorenz |
| Edward Yourdon | Edwin | ee |
| EEMA | EEPROM | EER |
| E. F. Codd | EFF | effective computable |
| effective number of bits | Effort Adjustment Factor | EFI |
| EFL | EFNet | Eforth |
| E-Forth | EFT | EFTPOS |
| EFTS | eg | EGA |
| Eggdrop | egosurfing | EGP |
| egrep | Egyptian brackets | Eh |
| eh | eHelp Corporation | EHTS |
| EIA | EIA-232 | EIA-232C |
| EIA-422 | EIA-423 | EIA-449 |
| EIA-485 | EIA-530 | EIDE |
| Eiffel | Eiffel source checker | eigenvalue |
| eigenvector | eight-bit clean | eight queens problem |
| eight queens puzzle | eighty-column mind | eighty-twenty rule |
| EIRP | EISA | EJB |
| Eksi Sozluk | EL1 | el(alpha) |
| Elan | El Camino Bignum | elder days |
| e-learning | Electing a Pope | Electrically Alterable Programmable Read-Only Memory |
| Electrically Erasable Programmable Read-Only Memory | Electromagnetic Compatibility | electromigration |
| electron | electronic commerce | Electronic Commerce Dictionary |
| electronic data interchange | Electronic Data Processing | Electronic Design Automation |
| Electronic Discrete Sequential Automatic Computer | Electronic Frontier Foundation | electronic funds transfer |
| Electronic Funds Transfer Point of Sale | electronic funds transfer system | electronic magazine |
| electronic mail | electronic mail address | electronic mail client |
| electronic meeting | Electronic Numerical Integrator and Computer | Electronic Performance Support System |
| Electronic Piece Of Cheese | Electronic Report Management | Electronics Industry Association |
| electronic whiteboarding | electron model | electron tube |
| Electrostatic Discharge | elegant | element |
| elephant | elephantine | elevator controller |
| ELF | ELI | Eli Compiler Construction System |
| ELISP | elite | ELIZA |
| ELIZA effect | Elk | ELLA |
| Ellemtel | Ellie | ELLIS |
| elm | ELMAGUIDE | ELMAMETA |
| ELP | ELSIE | Elvis |
| elvish | EM | EM-1 |
| EMA | Emacs | Emacs Lisp |
| e-mail | e-mail address | e-mail client |
| EMAS | Embedded Lisp Interpreter | Embedded Mode |
| embedded system | embedding | EMBLA Pro |
| embosser | EMC | EMD Enterprises, Inc. |
| EMDIR | Emerald | EMI |
| Emitter Coupled Logic | EML | EMM |
| EMM386 | emote | emoticon |
| empeg | empire | empty element tag |
| Empty Nest | EMS | emTeX |
| EMU8000 | emulation | emulator |
| Emulator program | EMX | enabling |
| Encapsulated PostScript | encapsulation | encode |
| encoder | encryption | endian |
| endless loop | End Of Line | End of Medium |
| End Of Text | End Of Transmission | end tag |
| end-to-end solution | End Transmission Block | end-user |
| engage | Engelbart, Douglas | engine |
| English | English shellcode | enhanced |
| Enhanced Capabilities Port | Enhanced Directory Service | Enhanced Dynamic Random Access Memory |
| Enhanced Graphics Adapter | Enhanced IDE | Enhanced Integrated Drive Electronics |
| enhanced parallel port | Enhanced Small Disk Interface | enhancement |
| ENIAC | Enigma | ENOB |
| ENQ | enqueue | ENS |
| Ente Nazionale Italiano di Unificazione | enterprise | Enterprise Application Integration |
| Enterprise JavaBeans | Enterprise Report Management | Enterprise Resource Planning |
| Enterprise Systems CONnectivity | EntireX | entity |
| entity-relationship diagram | entity-relationship model | entropy |
| Entry Sequenced Data Set | enumerated type | enumeration |
| environment | Environmental Audio eXtensions | environment variable |
| Envoy | EOF | EOL |
| EOR | EOT | EOU |
| EOUG | EP | EPCS |
| ephemeral port | EPILOG | EPIM |
| epistasis | EPL | EPOC |
| epoch | EPP | EPROM |
| EPROM OTP | EPROS | EPS |
| EPSILON | epsilon | epsilon squared |
| EPSIMONE | EPSS | EqL |
| EQLOG | EQLog | Eqn |
| equals | equational logic | Equational Programming Language |
| Equel | equivalence class | equivalence class partitioning |
| equivalence partitioning | equivalence relation | equivalent isotropically radiated power |
| ER | er | ERA |
| era | Erasable Programmable Read-Only Memory | erase |
| eraser stains code | ERC | ERCIM |
| ERD | EREW PRAM | ERFPI |
| ergonomic | ergonomics | ERGO-Shell |
| Eric Conspiracy | Eric S. Raymond | Eris |
| Erlang | ERM | erotica |
| ERP | error | error-based testing |
| error correcting memory | error detection and correction | es |
| ES-1 | ESA | ESC |
| ESCAPE | escape | escape sequence |
| ESCD | ESCON | escrow |
| ESD | ESDI | ESF |
| ESI | esim | ESL |
| ESLPDPRO | ESML | ESMTP |
| esolang | esoteric programming language | ESP |
| ESPOL | ESPRIT | ESR |
| essential complexity | Estelle | Esterel |
| EstPC | ET | et |
| ET++ | eta abstraction | eta conversion |
| eta expansion | eta reduction | ETB |
| ETC | e-text | ETHER |
| EtherGate | Ethernet | Ethernet address |
| Ethernet meltdown | Ethernet Private Line | EtherTalk |
| ethics | ETL | ETM |
| ETRN | ETSI | ETX |
| Euclid | Euclidean Algorithm | Euclidean norm |
| Euclid's Algorithm | Eudora | EULA |
| EULER | EuLisp | EUnet Ltd. |
| Euphoria | Eureka | Eureka step |
| Eurisko | Eurocard | Euro-ISDN |
| EuroNet | EuropaNET | European Academic and Research Network |
| European Committee for Standardization | European Computer-Industry Research Centre GmbH | European Computer Manufacturers Association |
| European Strategic Programme for Research in Information Technology | European Telecommunications Standards Institute | EUUG |
| EV6 | Eva | EVALUATE |
| evaluation | evaluation strategy | evaluator |
| EVE | event | Event Description Language |
| event-driven | EVGA | evolutionary algorithm |
| evolutionary computation | evolutionary programming | evolution strategy |
| EWOS | exa- | Exabyte |
| exabyte | examining the entrails | EXAPT |
| Excalibur bug | Exceed | Excel |
| Excelan | Excelerator | exception |
| exception handler | EXCH | Exchange Server |
| excl | exclamation mark | exclamation point |
| exclusive or | EXCP | EXE |
| EXEC | exec | EXEC 2 |
| EXEC 8 | executable | executable content |
| execute | Execute Channel Program | execution |
| executive | Executive Systems Programming Oriented Language | exercise, left as an |
| exhaustive testing | existence proof | existential quantifier |
| exit | EXODUS | eXodus |
| EXOS | expanded memory | expanded memory manager |
| expanded memory page frame | Expanded Memory Specification | expansion card |
| expansion slot | expect | eXperimental LISP |
| Experimental Physics Control Systems | Experimental Programming Language | Experiment Description Language |
| Expert Judgement Models | expert system | Expert Systems Ltd. |
| explicit parallelism | explicit type conversion | exploit |
| Exploratory Data Analysis | exponent | exponential |
| exponential-time | exponential-time algorithm | Express |
| expression | expression tree | extend |
| Extended Affix Grammar | Extended ALGOL | Extended Architecture |
| Extended Backus-Naur Form | Extended Binary Coded Decimal Interchange Code | Extended BNF |
| Extended C++ | Extended Capabilities Port | Extended Concurrent Prolog |
| Extended Data Out Dynamic Random Access Memory | Extended Data Out Random Access Memory | Extended Fortran Language |
| eXtended Graphics Array | Extended Industry-Standard Architecture | extended memory |
| extended memory manager | Extended Memory Specification | Extended ML |
| Extended Pascal | Extended Self-containing Prolog | Extended System Configuration Data |
| Extended Systems Modelling Language | Extended Tcl | Extended Tiny |
| Extended Video Graphics Array | eXtended Video Graphics Array | ExTendible Compiler |
| extensible | extensible database | Extensible Firmware Interface |
| Extensible HyperText Markup Language | Extensible Markup Language | Extensible Shell |
| Extensible Stylesheet Language | Extensible Stylesheet Language Transformations | Extensible VAX Editor |
| extension | extensional | extensional equality |
| extensionality | Extension Language Kit | Exterior Gateway Protocol |
| eXternal Data Representation | External Machine Interface | external memory |
| EXTRA | extranet | extrapolate |
| extrapolation | EXUG | eyeball search |
| EZ | ezd | e-zine |
| F100-L | f2c | F2F |
| F68K | FAC | facebook.com |
| face time | face-to-face | Facile |
| facsimile | FACT | fact |
| factor | factorial | FAD |
| failback | failover | failure |
| failure-directed testing | FAIR | Fairchild F8 |
| fall back | fall forward | fall over |
| fall through | fall thru | FALSE |
| FancyIndexing | fandango on core | fan-out |
| FAP | FAQ | FAQL |
| FAQ list | faradise | farkled |
| farm | farming | FARNET |
| fas | FASBOL | fascist |
| FASE | FAST | Fast ATA |
| Fast ATA-2 | Faster LEX | Fast Ethernet |
| Fast Fourier Transform | Fast Packet | Fast Page Mode Dynamic Random Access Memory |
| Fast SCSI | FAT | FAT32 |
| fatal | fatal error | fatal exception |
| fat binary | fat client | fat electrons |
| fault | fault-based testing | fault tolerance |
| fault tolerant | Fault Tolerant Unix | fault tree analysis |
| favicon.ico | fax | Fax over IP |
| FC | FC-AL | FCB |
| F-code | FCP | FC-PGA |
| FCS | FDC | FDD |
| FDDI | FDISK | fd leak |
| fdlibm | FDMA | FDSE |
| FDSP | FDT | fdx |
| FEA | fear and loathing | fear-driven development |
| feasibility study | feasible | feature |
| feature creature | feature creep | featurectomy |
| feature key | feature shock | FEC |
| FED | Federal Geographic Data Committee | Federal Information Exchange |
| Federal Information Processing Standards | Federal Networking Council | federation |
| Federation Against Software Theft Limited | Fedora | feed |
| feedback | feedback control | feed-forward |
| Feel | feep | feeper |
| feeping creature | feeping creaturism | FEL |
| femto- | fence | fencepost error |
| fepped out | FEPROM | Fermat prime |
| Fermat's Last Post | Ferranti F100-L | ferrite core memory |
| Ferroelectric RAM | Ferroelectric Random Access Memory | Fetch |
| fetch-execute cycle | Feynman, Richard P. | FF |
| ffccc | FFP | FFT |
| FGDC | FGHC | FGL |
| FGL+LV | FGRAAL | fgrep |
| FhG | FHS | FHSS |
| fi | Fiber Distributed Data Interface | Fiber Optic InterRepeater Link |
| fiber optics | Fibonacci sequence | Fibre Channel |
| Fibre Channel-Arbitrated Loop | fibre optics | FIDIL |
| FIDO | FidoNet | Fidonews |
| field | field circus | field effect transistor |
| field emission display | field mouse | field-programmable gate array |
| field servoid | FIFO | Fifth |
| Fifth Dimension Technologies | fifth generation language | fifth normal form |
| Fight-o-net | file | File Allocation Table |
| File Attach | File Composition | file compression |
| file control block | file descriptor | file descriptor leak |
| file extension | FileMaker | FileMaker, Inc. |
| filename extension | FileNet | File Request |
| File Separator | file server | File Service Protocol |
| file signature | file system | Filesystem Hierarchy Standard |
| file transfer | File Transfer Protocol | file type |
| filing system | filk | fill-out form |
| film at 11 | FILO | Filtabyte |
| filter | filter promotion | FIMS |
| Finagle's Law | Financial Information eXchange | Finder |
| fine adjuster | fine grain | finger |
| finger-pointing syndrome | finite | Finite Automata |
| Finite Automaton | finite differencing | Finite Impulse Response |
| Finite State Automata | Finite State Automaton | Finite State Machine |
| finn | FIPS | FIR |
| firebottle | firefighting | Firefox |
| firehose syndrome | firewall | firewall code |
| firewall machine | FireWire | fireworks mode |
| Firmware | firmy | first class module |
| first fit | first generation | first generation computer |
| first generation language | first-in first-out | first normal form |
| first-order | first-order logic | First Party DMA |
| fish | FISH queue | FITNR |
| FITS | FIX | fix |
| fixed disk | fixed point | fixed-point |
| fixed point combinator | fixed-radio access | fixed-width |
| FIXME | fixpoint | fj |
| Fjolnir | fk | FL |
| F+L | flag | flag day |
| FLAIR | flaky | flamage |
| flame | flame bait | flame off |
| flame on | flamer | flame war |
| flaming | FLAP | flap |
| flapping router | flarp | Flash |
| flash | flash drive | Flash EPROM |
| Flash Erasable Programmable Read-Only Memory | Flash Lights Impressively | flash memory |
| Flash ROM | flat | flat address space |
| flat ASCII | flat file | flat file database |
| flatten | flat thunk | Flavors |
| Fleng | FLEX | Flex |
| Flex++ | Flex 2 | FLI |
| flib | FLIC | FLIP |
| Flip Chip Pin Grid Array | flip-flop | flippy |
| FLIP-SPUR | float | floater |
| floating-point | floating-point accelerator | Floating-Point SPECbaserate |
| Floating-Point SPECbaseratio | Floating-Point SPECrate | Floating-Point SPECratio |
| floating point underflow | Floating-Point Unit | floating underflow |
| F-Logic | flood | FLOP |
| Floppy | floppy | floppy disc |
| floppy disk | floppy disk drive | floppy drive |
| FLOPS | Flops | floptical |
| Flow | flow chart | flow control |
| flower key | FLOW-MATIC or FLOWMATIC | flow of control |
| FLPL | FLUB | Fluegelman, Andrew |
| flush | Flynn's taxonomy | fly page |
| Flyspeck 3 | flytrap | FM |
| fm | FMPL | FMQ |
| FMS | FMV | FNAL |
| FNC | fnord | FN tunnelling |
| fo | FOAD | FOAF |
| FOCAL | FOCL | FOCUS |
| focus group | FOD | FOIL |
| FoIP | FOIRL | fold case |
| folder | fold function | FOLDOC |
| followup | font | fontology |
| foo | foobar | foogol |
| FOOL | fool file | Fools' Lisp |
| Foonly | FOOP | foot-net |
| footprint | for | fora |
| FORC | Force | ForceOne |
| ForceTwo | foreground | Foreign eXchange Office |
| Foreign eXchange Subscriber | foreign key | Foresight |
| for free | fork | fork bomb |
| forked | for loop | FORM |
| FORMAC | FORMAL | formal argument |
| Formal Description Technique | formal methods | Formal Object Role Modeling Language |
| formal review | format | FORMAT-Fortran |
| Formatting Output Specification Instance | Formes | form factor |
| form feed | form function | FORML |
| forms | formula | Formula ALGOL |
| Forsythe | FORTH | for The Rest Of Them |
| for The Rest Of Us | Forth Modification Lab | Fortran |
| Fortran 66 | Fortran 77 | Fortran 90 |
| Fortran Automatic Symbol Translator | Fortran D | Fortran I |
| Fortran II | Fortran III | Fortran IV |
| Fortran-Linda | Fortran M | Fortran Matrix Abstraction Technique Fortran |
| Fortran-Plus | FORTRANSIT | Fortran V |
| Fortran VI | Fortrash | FORTRUNCIBLE |
| fortune cookie | forum | for values of |
| forward | forward analysis | forward chaining |
| forward compatibility | forward compatible | forward delta |
| forward engineering | Forward Error Correction | forwards compatibility |
| forwards compatible | FORWISS | For Your Information |
| FOSI | FOSIL | FOSS |
| fossil | foundation | FOundation for Research and Technology - Hellas |
| four-colour glossies | four colour map theorem | four colour theorem |
| Fourier transform | fourth generation computer | fourth generation language |
| fourth normal form | Fowler-Nordheim tunnelling | Fox |
| FoxBASE+ | FoxPRO | Fox Software |
| Fox Wiki | FP | FP2 |
| FPA | fpc | FPGA |
| FPLMTS | FPM | FP/M |
| FPM DRAM | fprintf | fps |
| FPU | FQDN | FQL |
| fr | FRA | fractal |
| fractal compression | fractal dimension | FRAD |
| fragile | fragment | fragmentation |
| FRAM | frame | frame buffer |
| Frame Check Sequence | frame grabber | FrameKit |
| FrameMaker | frame pointer | frame rate |
| Frame Relay | Frame Relay Access Device | frames per second |
| Frame Technology Corporation | framework | Framework 4 |
| framing specification | FRANK | Franz Lisp |
| Fraps | Fraunhofer Gesellschaft | FRED |
| fred | Fredette's Operating System Interface Language | frednet |
| free | FreeBSD | FreeHEP |
| Freenet | Free Objects for Crystallography | Free On-line Dictionary |
| free open-source software | FreePPP | freerexx |
| free software | Free Software Foundation | free variable |
| freeware | freeze | Frege, Gottlob |
| frequency division multiple access | frequency division multiplexing | Frequency-Hopping Spread Spectrum |
| Frequency Modulation | Frequency Shift Keying | frequently asked question |
| Fresco | Fresh | friction feed |
| fried | Friend | FRINGE |
| frink | friode | fritterware |
| FRL | FRMT-FTRN | frob |
| frobnicate | frobnitz | Frobozz Magic Programming Language |
| frogging | Frolic | front end |
| front-end processor | front side bus | frotzed |
| frowney | fry | FS |
| FSB | fsck | FSF |
| FSK | FSL | FSM |
| FSP | fsplit | FT |
| FTAM | FTP | FTP archive |
| FTP by mail | FTP server | FTP Software, Inc. |
| FTTP | FTW | FTX |
| FUBAR | FUD | fudge |
| fudge factor | Fudgets | FUDGIT |
| FUD wars | Fuel-can | Fugue |
| Fujitsu | full-custom | full-duplex |
| full-duplex Switched Ethernet | full laziness | full-motion video |
| full outer join | fully associative cache | Fully Automated Compiling Technique |
| fully lazy lambda lifting | fully qualified domain name | fum |
| Fun | function | functional |
| functional database | functional dependency | functionality |
| functional language | functional program | functional programming |
| functional programming language | functional requirements | functional specification |
| functional testing | functional unit | function application |
| function complete | Function Graph Language | function inlining |
| function key | Function Point Analysis | functor |
| funky | FUNLOG | FunnelWeb |
| funny money | furigana | furrfu |
| FUSE | FUSION | fusion |
| FutureBasic | future date testing | futz |
| fuzzball | fuzzy computing | fuzzy logic |
| fuzzy subset | fweep | FWIW |
| fx | FX-87 | FX-90 |
| FXO | FXS | FYA |
| FYI | FYI4 | G |
| G2 | G3 | G4 |
| GA | ga | Gabriel |
| gabriel | Gabriel, Richard | GADS |
| Gaelic | gag | GAIA |
| GAL | Galaxy | Galileo |
| Gambit | Game Boy | games |
| game tree | GAMMA | gamma correction |
| GAMS | gamut | GAN |
| GANDALF | gang bang | GAP |
| GAPLog | garbageabetical order | garbage collect |
| garbage collection | Garbage In, Garbage Out | Gargoyle |
| Garnet | GARP | garply |
| Gartner Group | gas | GASP |
| gas plasma display | GAT | GATE |
| gate | gated | Gates |
| gateway | Gateway 2000 | Gauss |
| Gaussian distribution | gawk | GB |
| Gb | gb | g-bell |
| GBIP | GBML | gbps |
| GC | GCAL | GCC |
| GCL | G-Code | GCOS |
| GCOS Macro Assembler Program | GCR | GCT |
| gd | GDA | GDB |
| GDBPSK | Gödel, Kurt | GDI |
| GDMO | GDPL | GE |
| ge | GE-645 | GEA |
| GEANT | GECOM | GECOS |
| Gedanken | gedanken | geef |
| geek | geek out | GEI |
| GE Information Services | GEM | gen |
| gender mender | Gene Amdahl | General Activities Simulation Program |
| General Aerodynamic Simulation Program | General Dynamics Canada Ltd | General Electric |
| General Electric Comprehensive Operating System | General Magic | General Packet Radio Service |
| General Protection Failure | General Protection Fault | General Public Licence |
| General Public License | General Public Virus | General Purpose Graphic Language |
| General Purpose Interface Bus | General Purpose Language | General Purpose Macro-generator |
| General Recursion Theorem | generate | generation |
| Generic Array Logic | Generic Expert System Tool | generic identifier |
| genericity | generic markup | generic programming |
| Generic Routing Encapsulation | Generic Security Service Application Programming Interface | generic thunk |
| generic type variable | Genesia | genetic algorithm |
| genetic algorithms | genetic programming | GEnie Services |
| Genken Programming Language | GENOVA | gensym |
| Gensym Corporation | Gensym Standard Interface | Gentleman's Portable Coroutine System |
| GEN-X | Geographical Information System | Geographic Information System |
| geometric mean | GEORGE | GEORGE 3 |
| George Boole | Georg Simon Ohm | GEOS |
| GEPURS | Gerald | Gerald Sussman |
| German | German National Research Center for Computer Science | GEST |
| Get a life! | Get a real computer! | get.com |
| getty | gf | GFDL |
| g file | GFLOPS | GFR |
| GFS | gh | GHC |
| ghetto code | ghost | Ghostscript |
| ghostview | GHz | GI |
| gi | Gibson, William | gid |
| GIF | GIF89 | GIF89a |
| GIFF | gig | giga- |
| gigabit | gigabits per second | gigabyte |
| gigaflop | gigaflops | GigaHertz |
| GIGO | gilley | gillion |
| Gilmore, John | GIM-1 | GIN |
| GINA | Ginger | GIP |
| GIPS | GIRL | GIS |
| Giuseppe Peano | GIYF | GKS |
| GKS-3D | GL | gl |
| Glammar | glark | Glasgow Haskell Compiler |
| GLASS | glass | glass box testing |
| glassfet | glass tty | GLB |
| glibc | Glish | Glisp |
| glitch | glob | global index |
| globalisation | Global Network Navigator | Global Positioning System |
| Global System for Mobile Communications | glork | GLOS |
| GLOW | GLS | GLU |
| glue | glue language | glyph |
| Glypnir | gm | GMAP |
| GMD | GMD Toolbox for Compiler Construction | GMT |
| gn | gnarly | Gnat |
| GNATS | GNN | GNOME |
| Gnome Computers | GNU | GNU archive site |
| GNU assembler | GNU awk | GNU BC |
| GNU C | GNU C Library | GNU DC |
| GNU E | GNU Emacs | GNU Free Documentation License |
| GNU General Public License | GNUMACS | GNU mirror site |
| GNU Network Object Model Environment | Gnuplot | GNU Privacy Guard |
| GNU Problem Report Management System | GNU public licence | GNUS |
| GNU sed | GNU Smalltalk | GNUstep |
| GNU style | GNU superoptimiser | Go |
| goal | goal seek | Go Back N |
| gobble | GObject Introspection | Godwin's Law |
| Godzillagram | Goedel | go-faster stripes |
| Gofer | Goffin | go flatline |
| GO-GO | go gold | GOL |
| golden | golf ball printer | GOM |
| gonk | gonkulator | GOOD |
| Good Thing | Google | googol |
| googolplex | gopher | Gopher client |
| Gopher object type | Gopherspace | gorets |
| gorilla arm | go root | gorp |
| GOSIP | Gosling, James | GOSMACS |
| Gosperism | GOSPL | gotcha |
| goto | Gottlob Frege | gov |
| governance | Government OSI Profile | go voice |
| GP | gp | GPF |
| GPIB | GPL | GPM |
| GPRS | GPS | GPSS |
| GPU | GPV | GPX |
| gq | gr | GRAAL |
| grabber pointer | Grace Hopper | GRAF |
| Graffiti | GRAIL | GRAIN |
| grain | GRAM | grammar |
| grammar analysis | grammatical inference | Grandfather, Father, Son |
| granularity | Grapes | Grapevine |
| graph | Graph Algorithm and Software Package | graph coloring |
| graph colouring | Graphic ALGOL | Graphical Kernel System |
| Graphical User Interface | Graphic Display Interface | Graphic Language |
| graphics | graphics accelerator | graphics adapter |
| graphics adaptor | graphics card | Graphics Interchange Format |
| Graphics Interface Format | Graphics Language Object System | graphic workstation |
| Graph-Oriented Object Database | graph plotter | graph reduction |
| graph rewriting system | GRAPPLE | GRAS |
| GRASP/Ada | GRASPIN | grault |
| Gray | graybar land | Gray code |
| gray-scale | GRE | greater than |
| greatest common divisor | greatest lower bound | Great Renaming |
| Great Runes | Great Worm | greek |
| greeking | Green | Green Book |
| Green Book CD-ROM | green bytes | green card |
| green lightning | green machine | green monitor |
| Green's Theorem | Greenwich Mean Time | green words |
| Greg Olson | Gregorian calendar | grep |
| grey-scale | Greystone Technologies | GRG |
| GRIB | grick | grilf |
| Grim File Reaper | GRIND | grind |
| grind crank | GRIP | gripenet |
| gritch | grix | groff |
| grok | gronk | gronked |
| group | Group 3 | Group 4 |
| Group Code Recording | group identifier | Group Separator |
| Group-Sweeping Scheduling | Groupware | Groupwise |
| grovel | grunge | gry |
| GS | gs | GSBL |
| GSI | GSL | GSM |
| GSPL | GSS | GSS-API |
| gt | gtg | GTK+ |
| GTL | GT/SQL | gu |
| guaranteed scheduling | guard | Guarded Horn Clauses |
| gubbish | guest book | GUI |
| GUIDE | Guide | Guide to Available Mathematical Software |
| guiltware | gun | gunch |
| Gunning Transceiver Logic | gunzip | Gupta Corporation |
| gurfle | guru | guru meditation |
| Guy Lewis Steele, Jr. | Guy Steele | GVL |
| gw | GW-Ada | GW-BASIC |
| gweep | GWHIS | GWM |
| gy | Gypsy | gz |
| gzip | h | H.261 |
| H.264 | H.323 | Habitat |
| hack | hackathon | hack attack |
| hacked off | hacked up | hacker |
| hacker ethic | hacker humour | hacking run |
| Hacking X for Y | Hackintosh | hackish |
| hackishness | hackitude | hack mode |
| hack on | hack together | hack up |
| hack value | ha ha only serious | hair |
| hairball | hairy | hairy ball |
| HAKMEM | hakspek | HAL |
| half-duplex | halftone | HALGOL |
| HALMAT | Hal/S | Halt and Catch Fire |
| halting problem | Hamilton | Hamiltonian cycle |
| Hamiltonian path | Hamiltonian problem | Hamiltonian tour |
| Hamilton's problem | hammer | Hamming code |
| Hamming distance | Hamming, Richard | hamster |
| Han character | HAND | hand cruft |
| Handel | hand hack | Hand-held Personal Computer |
| handle | handoff | handover |
| hand-roll | handshake | handshaking |
| handwave | hang | hanja |
| Hanoi | Han Unification | hanzi |
| happily | Happy | haptic interface |
| haptics | haque | hard boot |
| hard-coded | hardcopy | hard crash |
| hard disk | hard disk drive | hard drive |
| hard link | hard linking | hard sector |
| hardware | Hardware Abstraction Layer | hardware circular buffer |
| Hardware Description Language | hardware handshaking | hardware register |
| hardwarily | hard-wired | Harris Semiconductor Ltd. |
| Harvard architecture | Harvard Graphics | Harvard Mark II Machine |
| Harvest | Harvest C | hash |
| hash bucket | hash character | hash coding |
| hash collision | hash function | hashing |
| hash table | Haskell | Haskell B |
| Haskell Curry | Haskell User's Gofer System | HASL |
| HASP | has the X nature | hat |
| hate-driven development | Hayes | Hayes-compatible |
| Haze | HBOOK | hc |
| HC-900 | HCF | HCI |
| HCLP | HCPRVR | HCS |
| HD | HD6309 | HDA |
| HDC | HDD | HDF |
| HDFL | HDL | HDLC |
| HDM | HDMI | HDSL |
| HDTV | hdx | Head Disk Assembly |
| header | Head Normal Form | head normalisation theorem |
| heads down | head-strict | heap |
| heartbeat | heatseeker | heat sink |
| heat slug | heavy metal | heavyweight |
| heavy wizardry | Hebbian learning | heisenbug |
| Helen Keller mode | Helix | hello |
| hello packet | hello, sailor! | hello, world |
| HELP | Helvetica | henry |
| HENSA | HEP | HEPDB |
| HEPiX | HEPnet | HEPVM |
| HEQS | HERA | HERAKLIT |
| here document | Herman Hollerith | Hermes |
| Hesiod | heterogeneous | heterogeneous network |
| heterogenous | heuristic | heuristics testing |
| Hewlett-Packard | Hewlett-Packard Graphics Language | Hewlett-Packard Interface Bus |
| Hewlett Packard Multi Processing Executive | Hewlett Packard Precision Architecture | Hewlett-Packard Visual Engineering Environment |
| hex | hexadecimal | hexidecimal |
| hexit | HFC | HHCP |
| HHOJ | HHOK | HHOS |
| hi | HIBOL | HID |
| hidden flag | hierarchical database | Hierarchical Data Format |
| Hierarchical Design Methodology | hierarchical file system | Hierarchical Music Specification Language |
| hierarchical navigation | Hierarchical Object Oriented Design | hierarchical routing |
| hierarchy | Higgs Bugson | high bit |
| High bit-rate Digital Subscriber Line | high colour | High-Definition Multimedia Interface |
| high density | Higher Education National Software Archive | higher-order function |
| higher-order macro | High-level Data Link Control | high-level language |
| high memory area | high moby | High Performance Computing and Communications |
| High Performance File System | High Performance Fortran | High Performance Parallel Interface |
| High Performance Routing | High Performance Serial Bus | High Speed Circuit Switched Data |
| High Speed Connect | High-speed Net Connect | high speed serial interface |
| High Voltage Differential | HIGZ | hill climbing |
| HiLog | HIMEM | Hindenbug |
| hing | HINT | HiPAC |
| HIPPI | hiragana | hirsute |
| HISTORIAN | history | hit |
| Hitachi 6309 | Hitachi HD64180 | HITL |
| hit rate | hk | HL7 |
| HLISP | HLL | HLLAPI |
| hlp | hm | HMA |
| HMAC | hmake | HMD |
| HMP | HMSL | HMTL |
| hn | HNAP | HNAP1 |
| HNC | HO | Hoare powerdomain |
| Hobbit | hobbit | hog |
| HOL | HOL-88 | HOL-90 |
| hole | hole model | Hollerithabetical order |
| Hollerith, Herman | Hollywired | HOL-UNITY |
| holy wars | home | home box |
| home keys | home machine | Home Network Administration Protocol |
| home page | Home Phoneline Networking Alliance | HomePNA |
| home row keys | homogeneous | homogenous |
| homomorphism | honeypot | Honeywell |
| Honeywell-800 Business Compiler | HOOD | HOOK |
| hook | hop | Hope |
| Hope+ | Hope+C | Hopfield model |
| Hopfield network | horizontal application | horizontal encoding |
| horizontal loop combination | horizontal microcode | horizontal scan rate |
| horizontal tabulation | Horn clause | hose |
| hosed | HOS-STPL | host |
| host adapter | Host Command Facility | Host Control Interface |
| host-host layer | hosting | hostname |
| host number | hosts file | Hot Fix |
| HotJava | Hotline | Hotline Communications Ltd. |
| Hotline Connect | hotlink | hotlist |
| Hotmail | hot spot | Hot Standby Routing Protocol |
| Hot Swapable Routing Protocol | Hot Swappable Routing Protocol | hot swapping |
| HOTT | house wizard | Houston Automatic Spooling Program |
| Howe, Denis | how many nibbles are in a byte | how many nibbles in a byte |
| HP | hp2ps | HP9000 |
| H/PC | HPCC | HPcode |
| HPCode-Plus | HPF | HPFS |
| HP-GL | HP-GL/2 | HP-IB |
| HPL | HPLOT | HP-MPE |
| HP-PA | HPPI | HPR |
| HP-SUX | HP-UX | HP VEE |
| hqx | hr | href |
| hs | HSB | HSC |
| HSCSD | HSL-FX | HSM |
| HSRP | HSSI | HSV |
| HT | ht | HTH |
| HTLM | HTML | HTML+ |
| htmlcommentbox.com | HTTL | HTTP |
| HTTP/1.0 | HTTP cookie | HTTPd |
| HTTP proxy server | HTTP response status code | HTTPS |
| HTTP server | hu | hub |
| Hubnet | hubs | Hudson |
| hue | hue, saturation, brightness | hue, saturation, value |
| huff | Huffman | Huffman code |
| Huffman coding | Huffman encoding | Hugh Loebner |
| HUGO | HUGS | Human-Computer Interaction |
| Human-Computer Interface | Human Interface Device | Human Interface Technology Laboratory |
| humanist technology | humma | humor |
| humour | hung | Hungarian Notation |
| Hungry Programmers | hungry puppy | Hungry ViewKit |
| hungus | Hunt the Wumpus | Hurd |
| HVD | Hybrid | Hybrid Fiber Coax |
| hybrid multiprocessing | hybrid testing | hydra code |
| hydrofluorocarbon | HyperBase | Hyper-C |
| HyperCard | hypercube | Hyperion |
| hyperlink | Hyper-Man | hypermedia |
| HyperNeWS | Hyperscript | hyperspace |
| HyperSPARC | Hyperstrict | HyperTalk |
| hypertext | hypertext link | Hypertext Markup Language |
| Hypertext Transfer Protocol | HyperText Transmission Protocol, Secure | hypervisor |
| hyperware | hypotenuse | hysterical reasons |
| Hytelnet | HyTime | i18n |
| I2O | i386 | i486 |
| i487 | i860 | IA |
| IA32 | IAB | IAD |
| IAL | IAM | IANA |
| IANAL | IAP | I-APL |
| IAR | IAS | IAW |
| IAYSDAH | IBEX | IBM |
| IBM 1130 | IBM 1403 | IBM 1620 |
| IBM 1710 | IBM 2741 | IBM 3270 |
| IBM 360 | IBM 370 | IBM 370ESA |
| IBM 370XA | IBM 3720 | IBM390 |
| IBM 650 | IBM 700 series | IBM 701 |
| IBM 704 | IBM 7040 | IBM 705 |
| IBM 709 | IBM 7090 | IBM 7094 |
| IBM 801 | IBM compatible | IBM Customer Engineer |
| IBM discount | IBM PC | IBM PC AT |
| IBM PCjr | IBM PC XT | IBM System/36 |
| IBM Systems Engineer | IBM zSeries | Ibpag2 |
| Iburg | IC | ICA |
| ICAM | ICANN | I-CASE |
| ICBM address | ICE | icebreaker |
| ICES | ICETRAN | ICI |
| ICL | ICMP | ICMP Router Discovery Protocol |
| I-Comm | iCOMP | Icon |
| icon | Icon-Based Parser Generation System 2 | Iconicode |
| ICONIX Software Engineering, Inc. | IC-Prolog | IC Prolog II |
| ICQ | ICSI | ICT |
| ICW | ICWS | Id |
| id | I-D | ID10T |
| IDAMS | IDD | IDE |
| IDEA | IDEAL | ideal |
| Idealized CSP | Idealized Instruction Set | IDEF |
| IDEF0 | idempotent | identifier |
| ideogram | I didn't change anything! | idk |
| IDL | IDMS | IDMSX |
| Id Nouveau | IDOL | IDS/I |
| IDSN | id Software | IDSS |
| IE | ie | IEC |
| IEC 559 | IEEE | IEEE 1076 |
| IEEE 1394 | IEEE 488 | IEEE 754 |
| IEEE 802 | IEEE 802.1 | IEEE 802.2 |
| IEEE 802.3 | IEEE 802.3u | IEEE 802.3z |
| IEEE 802.4 | IEEE 802.5 | IEEE Computer Society |
| IEEE Floating Point Standard | IEEE Standard 1149.1 | IEF |
| IEN | IEPG | IESG |
| IETF | IF1 | IF2 |
| IFAC | IFC | ifdef out |
| IFDL | IFF | iff |
| IFIP | IFP | IFS |
| IFX | If you want X, you know where to find it. | IGC |
| IGES | IGL | IGMP |
| IGP | IGPL | IGS |
| IGU | IHS | IHV |
| IIcx | IIDMS/R | IIL |
| IINREN | IIOP | IIR |
| IIRC | IIS | IIT |
| IITF | IITRAN | il |
| ILBM | ILF | ILIAD |
| I-Link | ILISP | ill-behaved |
| ILLIAC | Illiac IV | Illinois Functional Programming |
| ILOC | Ilog Solver | iMac |
| image | image formats | image map |
| image processing | image recognition | imaging |
| Imago Europe plc | Imago On-line | imake |
| IMAO | IMAP | imc |
| IMD | IMHO | IML |
| immediate version | Imminent Death Of The Net Predicted! | IMNSHO |
| IMO | IMP | impact printer |
| impedance | imperative | imperative language |
| imperative programming | Imperial College of Science, Technology and Medicine | Imperial Software Technology |
| IMPlementation language | implication | implicit parallelism |
| implicit type conversion | implies | imply |
| import | imprecise probability | IMProved Mercury autocode |
| IMR | IMS | IMS 6100 |
| Imsai | IMS/Data Base | IMS/Data Communications |
| IMSE | IMTC | in |
| Ina Jo | InARP | in-band signaling |
| in-band signalling | inc | incantation |
| include | include war | inclusive |
| incomparable | incremental analysis | incremental backup |
| incremental constraint solver | Incremental Prototyping Technology for Embedded Realtime Systems | increment operator |
| indent | indentation | indent style |
| Independent Computing Architecture | Independent Logical File | Independent Verification and Validation |
| index | Index Data | IndexedDB |
| Indexed Sequential Access Method | index.htm | index.html |
| index register | indices | indirect address |
| indirect addressing | indirection | indirect jump |
| induction | inductive inference | inductive relation |
| Industrial Programming, Inc. | Industrial Robot Language | Industry Standard Architecture |
| inetd | inews | infant mortality |
| infeasible path | inference | inference engine |
| inference rule | infimum | infinite |
| Infinite Impulse Response | infinite loop | Infinite Monkey Theorem |
| infinite set | infinity | infix notation |
| infix syntax | inflate | INFN |
| Infobahn | Info BASIC | infobot |
| Informatics Corporation | information | Information Algebra |
| Information and Communication Technology | Information Appliance | Information Builders |
| Information Engineering Facility | information highway | Information Infrastructure Task Force |
| Information Innovation | information island | Information Management |
| Information Management System | information overload | Information Processing Language |
| Information Resource Management | information superhighway | Information Systems Factory |
| information technology | information technology governance | Information Technology Infrastructure Library |
| Informix | InfoSeek | InfoStreet, Inc. |
| infotainment | InfoWord Office | infrared |
| Infrared Data Association | infrastructure | Inglish |
| INGRES | inheritance | initgame |
| initialise | Initial Microprogram Load | Initial Operational Test and Evaluation |
| Initial Program Load | Initial Program Loader | initiator |
| injection | inkjet printer | ink printer |
| inline | inline element | inline image |
| INMOS transputer | inner class | inner join |
| inner product | InnovAda | inode |
| in-order traversal | inout | IN point |
| Inprise Corporation | Input | input |
| input device | input/output | input/output redirection |
| inquiry/response system | INRIA | insanely great |
| insertion sort | INSIGHT | Insignia Solutions, Inc. |
| inspection | installable file system | installed user base |
| installer | instance | instance variable |
| instantiate | instantiation | Institute for Global Communications |
| Institute of Electrical and Electronics Engineers, Inc. | Institut National de Recherche en Informatique et Automatique | instruction |
| Instruction Address Register | instructional technology | instruction mnemonic |
| instruction prefetch | instruction register | instruction scheduling |
| instruction set | instruction set architecture | Instruction Set Processor |
| instrument | int | INTCODE |
| integer | Integer SPECbaserate | Integer SPECbaseratio |
| Integer SPECrate | Integer SPECratio | integrated circuit |
| Integrated Database Management System | Integrated Development Environment | Integrated Drive Electronics |
| Integrated Information Technology | Integrated Modelling Support Environment | Integrated Project Support Environment |
| Integrated Services Digital Network | Integrated Systems Architecture | Integrated Systems Laboratory |
| integration | integration testing | integrity |
| integrity constraint | Intel | Intel 4004 |
| Intel 4040 | Intel 486 | Intel 486DX |
| Intel 486SX | Intel 487SX | Intel 8008 |
| Intel 80186 | Intel 80188 | Intel 80286 |
| Intel 80386 | Intel 80386DX | Intel 80386SX |
| Intel 8048 | Intel 80486 | Intel 8051 |
| Intel 8080 | Intel 8085 | Intel 8086 |
| Intel 8088 | Intel 80x86 | Intel 8751 |
| Intel Comparative Microprocessor Performance index | Intel Corporation | IntelDX4 |
| Intel i960 | INTELLECT | intellectual property |
| intelligent backtracking | intelligent database | Intelligent Input/Output |
| Intelligent I/O | intelligent key | intelligent terminal |
| IntelliMouse | Intel Literature Sales | Intelsat |
| Intel x86 | intensional | Intent to Package |
| INTERACTIVE | interactive | Interactive and Batch EXecutive |
| Interactive CourseWare | Interactive Data analysis Language | Interactive Data Entry/Access |
| Interactive Data Language | Interactive Development Environment | Interactive Development Environments |
| Interactive Software Engineering | Interactive System Productivity Facility | Interactive Voice Response |
| Interagency Interim National Research and Education Network | InterBase | INTERCAL |
| Interchange File Format | INTERCOM | Interdata |
| Interest Group in Pure and Applied Logics | interesting | inter-exchange carrier |
| interface | interface analysis | Interface Architect |
| Interface Definition Language | Interface Description Language | Interface Message Processor |
| Interior Gateway Protocol | interlace | interlaced image |
| interlacing | Interlan | Interleaf |
| interleave | interleaving | INTERLINK |
| Interlisp | Interlisp-10 | Interlisp-D |
| Intermedia | Intermedia Interchange Format | intermediate code |
| Intermediate Distribution Frame | Intermediate Programming Language | Intermediate System |
| Intermediate System-Intermediate System | intermercial | Intermetrics, Inc. |
| intermodulation distortion | internal field separators | Internal Translator |
| International Algebraic Language | International Atomic Time | International Business Machines |
| International Computers Limited plc | International Core War Society | International Data Encryption Algorithm |
| International Electrotechnical Commission | International Federation for Information Processing | International Function Point Users Group |
| internationalisation | internationalization | International Multimedia Teleconferencing Consortium |
| International Olympiad in Informatics | International Organisation for Standardisation | International Organization for Standardization |
| International Phonetic Alphabet | International Programmable Airline Reservation System | International Smalltalk Association |
| International Standard | International Telecommunications Union | International Traffic in Arms Regulation |
| Internaut | Internet | Internet Access Provider |
| Internet Adapter | Internet address | internet address |
| Internet Architecture Board | Internet Assigned Numbers Authority | Internet backbone |
| Internet Chess Server | Internet Control Message Protocol | Internet Corporation for Assigned Names and Numbers |
| Internet-Draft | Internet Engineering and Planning Group | Internet Engineering Steering Group |
| Internet Engineering Task Force | Internet Experiment Note | Internet Explorer |
| Internet Express | Internet Foundation Classes | Internet Go Server |
| Internet Group Management Protocol | Internet Information Server | Internet Inter-ORB Protocol |
| Internet Message Access Protocol | Internet Monthly Report | Internet Network Information Center |
| internet number | Internet Open Trading Protocol | Internet Protocol |
| Internet Protocol Control Protocol | Internet Protocol version 4 | Internet Protocol version 6 |
| Internet provider | Internet Public Library | Internet Registry |
| Internet Relay Chat | Internet Research Steering Group | Internet Research Task Force |
| Internet Security Association and Key Management Protocol | Internet Server Application Programming Interface | Internet Service Provider |
| Internet Society | Internet Telephony | Internet Telephony Service Providers |
| internetworking | Internetwork Packet eXchange | Internet Worm |
| Internex On-Line | InterNIC | interoperability |
| interoperable database | inter-packet gap | interpolation |
| Interpress | interpreted | interpreter |
| Interpretive Menu Processor | Inter-process Communication | interrupt |
| interrupt handler | interrupt list | interrupt priority level |
| interrupt request | interrupts | Intersil 6100 |
| Intersil 6120 | interstitial | Intertec |
| interupt | interval | InterViews |
| interworking | intranet | Intrinsics |
| introspection | introspection annotation | Intrusion Countermeasure Electronics |
| Intrusive Testing | Intuition | intuitionism |
| intuitionistic logic | intuitionistic probability | intuitionist logic |
| invariant | inverse | Inverse Address Resolution Protocol |
| inverse comment convention | inverted index | invoking a method |
| InWorld VR | IO | io |
| I/O | IOI | Iomega Corporation |
| I-OOA | I/O redirection | IOS |
| Iota | IOT&E | IOW |
| IP | IPA | iPad |
| IP address | IPARS | I-Pay |
| IPC | ipconfig | IPCP |
| IPE | Iperf | IPL |
| IP next generation | IPng | IP number |
| IPoAC | IP over Avian Carriers | IPS |
| IPSE | IPsec | IPT |
| IP Telephony | IPv4 | IPv6 |
| IPX | IPXCP | IQ |
| iq | IQL | IR |
| ir | IrBUS | IRC |
| ircop | IRC penis war | IrDA |
| IrDA-C | IrDA Control | IrDA Data |
| IRDATA | IRDP | IRDS |
| IRET | IRIS | Iris |
| IRISA | IRIS Explorer | IRIX |
| IRL | IRM | iron |
| Iron Age | iron box | Ironman |
| ironmonger | IRQ | irrational number |
| irrefutable | IRSG | IRTF |
| IRUS | Irvine Dataflow | Irvine Research Unit in Software |
| IS | is | IS-11172 |
| IS-13818 | ISA | Isabelle |
| Isabelle-92 | Isabelle-93 | ISA bus |
| ISAKMP | ISAM | ISAPI |
| ISAPI filter | ISBL | ISDE |
| ISDN | ISE | ISEE |
| I see no X here. | ISETL | ISF |
| ISINDEX | ISIS | IS-IS |
| ISL | ISLisp | ISMAP |
| ISO | ISO 10646 | ISO 3166 |
| ISO 639-1 | ISO 639-2 | ISO 8072 |
| ISO 8073 | ISO 8208 | ISO 8326 |
| ISO 8327 | ISO 8485 | ISO 8613 |
| ISO 8649 | ISO 8650 | ISO 8805 |
| ISO 8807 | ISO 8822 | ISO 8823 |
| ISO 8825 | ISO 8859 | ISO 8859-1 |
| ISO 8879 | ISO 9000 | ISO 9072 |
| ISO 9660 | ISO 9735 | ISOC |
| ISO C | isochronous | isochronous transfer |
| ISODE | ISO Development Environment | ISO/IEC 10646-1 |
| ISO/IEC 26300 | isolated | ISO Latin 1 |
| isometric joystick | isometry | isomorphic |
| isomorphism | isomorphism class | ISO Pascal |
| ISO seven layer model | ISP | ISPBX |
| ISPF | ISPL | ISPS |
| IST | ISTAR | ISTM |
| ISV | ISWIM | IT |
| it | ITAR | Iterated Function System |
| iteration | iterative deepening | iterator |
| Iternet | IT governance | ITHACA |
| ITIL | ITP | ITS |
| it's a feature | ITSP | ITU |
| ITU-T | ITU-T X.680 | ITU X.209 |
| Ivan | Ivan Sutherland | Iverson's Language |
| IVR | ivs | IVTRAN |
| IV&V | IVY | IWay |
| IWBNI | IXC | IXI Limited |
| IXO | IYFEG | J |
| J2EE | J2ME | J2SE |
| J3 | J73 | jabber |
| JACAL | jaccl | jack in |
| Jack Kilby | Jackson method | Jacquard, Joseph-Marie |
| Jacquard loom | JAD | JADE |
| Jade | jadeTeX | JAffer's Canonical ALgebra |
| jaggies | JaM | jam |
| James Clark | James' DSSSL Engine | James Gosling |
| James H. Clark | JAM Programming Language | JANET |
| JANET IP Service | Janus | japh |
| jar | jargon | Jargon File |
| Java | Java 2 | Java 2 Platform |
| Java 2 Platform, Enterprise Edition | Java 2 Platform, Micro Edition | Java 2 Platform, Standard Edition |
| Java 2 SDK | Java 2 Software Development Kit | Java archive |
| JavaBeans | Java Community Process | Java Database Connectivity |
| Java Development Kit | Java Message Service | Java Native Interface |
| Java Open Language Toolkit | Java Remote Method Protocol | Java Run-Time Environment |
| JavaScript | JavaScript Object Notation | Java servelet |
| JavaServer Faces | JavaServer Pages | Java servlet |
| Java Servlet Development Kit | Java Virtual Machine | Java VM |
| JAZ | Jaz | Jaz Drive |
| JAZELLE | JBIG | JBOD |
| JBOPS | jc | JCL |
| JCOOL | JCP | JCS-13 |
| JDBC | JDK | JEAN |
| Jean E. Sammet | Jean-Maurice-Émile Baudot | JEDR |
| Jef Raskin | Jenga Code | Jenkins |
| Jerry Sussman | JES | JES2 |
| JES3 | JFCL | JFDI |
| JFET | JFGI | JFIF |
| jiffy | Jim Clark | Jini |
| JIPS | JIT | jitter |
| JK flip-flop | jm | J.M.E. Baudot |
| JMHO | JMS | JNI |
| JNT Association | jo | job |
| Job Control Language | Job Entry System | Jobs |
| job security | jock | joe |
| joe code | John Atanasoff | John Gilmore |
| John Mauchly | John McCarthy | Johnniac |
| JOHNNIAC Open Shop System | John Ousterhout | John Tukey |
| John Vincent Atanasoff | John von Neumann | join |
| Joint Academic NETwork | Joint Bi-level Image Experts Group | Joint Photographic Experts Group |
| Joint Technical Committee | Joint Test Action Group | Joliet |
| jolix | JOLT | Jonathan's Own Version Of Emacs |
| Jon Postel | JOOP | Joseph-Marie Jacquard |
| Josephson Junction | JOSS | Jossle |
| journal | journalling | jove |
| JOVIAL | Joy | Joyce |
| joystick | Joy, William | jp |
| JPEG | JPEG-2000 | JPEG File Interchange Format |
| jpg | JPL | JPLDIS |
| J. Presper Eckert | J. Random | J. Random Hacker |
| JRE | JRL | JRMP |
| JS | JSA | JSDK |
| JSF | JSON | JSP |
| JSTL | JTAG | JTB |
| JTC | JTC1/SC24 | JTS |
| juggling eggs | Jughead | juice jacking |
| jukebox | jump | jumper |
| jump off into never-never land | jump trace buffer | Junction FET |
| Junction Field Effect Transistor | Juno | jupiter |
| Just a Bunch Of Disks | just-in-time | JVM |
| Jym | K | K5 |
| K56flex | K6 | K7 |
| KA9Q | KADS | kahuna |
| Kaleidoscope | Kali | kamikaze packet |
| Kamin's interpreters | kana | kangaroo code |
| kanji | KAOS | KAP |
| Karel | katakana | Katmai New Instructions |
| KB | KBMS | kbps |
| KBS | KC-85/1 | KC85/2 |
| KC85/3 | KC85/4 | KCL |
| ke | KEE | keep-alive |
| Keldysh Institute of Applied Mathematics | ken | Kent Applicative Operating System |
| Ken Thompson | Kent Recursive Calculator | Kerberos |
| Kermit | kern | kernal |
| kernel | Kernel Parlog | kernel style |
| Kernel User Interface Package | kerning | Kevo |
| key | keyboard | Keyboard Commando |
| keyboard plaque | Keyboard Send Receive | Keyboard Video Mouse |
| Keyed-Hashing Message Authentication | Keyed Sequenced Data Set | key escrow |
| key field | key frame | keylogger |
| KeyNote Software | keypad | keypal |
| KeySpell | keyword | keyword in context |
| KFX | kg | kgbvax |
| kh | Khornerstone | Khwarizmi |
| ki | kibibyte | KIBO |
| kiboze | kick | kicking dead whales down the beach |
| Kid | KIDASA Software | killer micro |
| killer poke | kill file | kilo- |
| kilobaud | kilobit | kilobits per second |
| kilobyte | kiloflops | kiosk |
| KIPS | KIS | KISS |
| KISS Principle | kit | KL0 |
| KL1 | Klamath | KLB |
| Kleene closure | Kleene star | Kleene, Stephen Cole |
| Klerer-May System | KLOC | klone |
| KL-ONE | kludge | kluge |
| kluge around | km | KMODEL |
| KMS | kn | knapsack problem |
| KNI | Knights of the Lambda-Calculus | knowbot |
| Knowbot Information Service | knowledge | Knowledge Analysis and Design System |
| knowledge base | knowledge-based system | knowledge level |
| Knowledge Management System | Knowledge Query and Manipulation Language | knowledge representation |
| Knowledge Sharing Effort | Knowledge Systems Laboratory | Known Lazy Bastard |
| Knuth | Kodak | Kohonen |
| KOMPILER | Konrad Zuse | Korf, Richard |
| Korn Shell | kp | KQML |
| KR | kr | K&R |
| KRC | K&R C | kremvax |
| KRL | KRS | K&R style |
| KRYPTON | ksh | KSL |
| KSR | KTH | kthx |
| KUIP | Kungliga Tekniska Högskolan | KUTGW |
| Kvatro Telecom AS | Kvikkalkul | KVM |
| kw | KWIC | ky |
| Kyoto Common Lisp | kyrka | kz |
| L0 | L0pht | l10n |
| L1 cache | L2 cache | L2CAP |
| L2TP | L6 | la |
| label | labeled fields | label edge router |
| Label Forwarding Information Base | label switched path | label switching |
| Label Switching Router | Lab for Computer Science | Laboratoire lorrain de recherche en informatique et ses applications |
| Laboratory INstrument Computer | Laboratory Virtual Instrument Engineering Workbench | LaborNet |
| Labtech Notebook | LabVIEW | Lace |
| lace card | ladder logic | LADY |
| lag | Lakota | LALR |
| lalr.ss | Lambada-Calculus | LAMBDA |
| lambda abstraction | lambda-calculus | lambda expression |
| lambda lifting | LambdaMOO | Lambda Prolog |
| lamer | LAMINA | lamp-post error |
| LAN | LAN administrator | LANCE |
| language | language-based editor | language code |
| Language for Communicating Systems | Language for the On-Line Investigation and Transformation of Abstractions | Language H |
| language lawyer | Language Of Temporal Ordering Specification | Language Sensitive Editor |
| language-sensitive editor | languages of choice | Laning and Zierler |
| Lan Kanal Adapter | LANL | Lan Manager |
| LANtastic | LAP | LAP4 |
| LAPB | LAPD | LAPM |
| LAPSE | laptop | laptop computer |
| LaQuey | Larch | Larch/C++ |
| LARCH/CLU | Large Installation Systems Administration | Larry Wall |
| LART | larval stage | lase |
| laser | laser printer | Lasherism |
| last call optimisation | last-in first-out | LAT |
| latch | latency | LaTeX |
| Latin 1 | lattice | LAU |
| laundromat | LAURE | LAVA |
| law | LAWN | Lawrence Livermore Labs |
| Lawrence Livermore National Laboratory | LAX | layer |
| layer 1 | layer 2 | layer 3 |
| layer 4 | layer 5 | layer 6 |
| layer 7 | Layer Two Tunneling Protocol | laziness |
| lazy evaluation | lazy list | Lazy SML |
| lazy sml2c | Lazy Standard ML | lb |
| LBA | LBE | LBL |
| LBX | lc | LCC |
| lcc | LCD | LCF |
| LCL | lclint | LCP |
| LCS | ld | LDAP |
| LDB | LDL | LDL1 |
| LDP | LDT | LE/1 |
| leading | LEAF | leaf |
| Leaf Distribution Limited | leaf site | League for Programming Freedom |
| leak | leaky heap | Lean |
| LEAP | leapfrog attack | leap second |
| learning curve | leased line | least fixed point |
| least recently used | least significant bit | least upper bound |
| leaves | LEC | LECOM |
| LED | LEDA | Leda |
| LED page printer | LED printer | leech |
| leet | left arrow | left brace |
| left bracket | left join | left outer join |
| left parenthesis | LeFun | legacy |
| legacy code | legacy software | legacy system |
| legal | legalese | LEGOL |
| Le-Lisp | lemma | Lempel-Ziv compression |
| Lempel-Ziv Welch compression | Lenat, Doug | lenient evaluation |
| LEO | Leo | LER |
| LERP | less than | LessTif |
| let floating | letterbomb | level 1 cache |
| level 2 cache | LEVEL5 OBJECT | level one cache |
| level-sensitive scan design | level two cache | Lex |
| lexeme | lexer | lexical analyser |
| lexical analysis | lexical scope | lexical scoping |
| lexiphage | LF | LFIB |
| LG | LGDF | LGEN |
| LGN | lha | LHARC |
| lhs | li | Liana |
| Liar | liar paradox | lib |
| libg++ | library | Library of Efficient Data types and Algorithms |
| librery | LIDO | LiE |
| LIF | life | life-cycle |
| LIFIA | LIFO | lifted domain |
| LIGHT | light client | light-emitting diode |
| light-emitting resistor | light pen | light pipe |
| light-weight | Lightweight Directory Access Protocol | light-weight process |
| like kicking dead whales down the beach | like nailing jelly to a tree | like this |
| Lila | Lilith | LILLIAC IV |
| lilo | Lily | LIMDEP |
| LIM EMS | LIMP | Linc |
| Lincoln Reckoner | LINCtape | Linda |
| LindaLISP | line | line 666 |
| linear address space | linear argument | linear assignment |
| linear function | Linear Graph Notation | linear logic |
| linear map | linear programming | linear space |
| linear topology | linear transformation | linear type |
| line conditioning | line eater | line editor |
| line feed | line noise | line printer |
| line probing | lines of code | lines per minute |
| line starve | Lingo | LINGOL |
| link | Link Access Procedure on the D channel | Link Access Protocol Balanced |
| Link Access Protocol for Modems | linkage editor | Link Control Protocol |
| link-dead | link editor | linked list |
| linker | link farm | link loader |
| link rot | links | Link State Routing Protocol |
| LINPACK | lint | Linux |
| Linux Documentation Project | Linux Loader | Linux Network Administrators' Guide |
| Linux User Group | lion food | Lions Book |
| LIPL | liquid crystal display | LIS |
| LISA | Liskov, Barbara | Liskov substitution principle |
| Lisp | LISP 1 | LISP 1.5 |
| LISP 2 | LISP70 | LISP A |
| LISP Extended Algebraic Facility | Lispkit | Lispkit Lisp |
| Lisp-Linda | Lisp Machine | LISP Machine LISP |
| Lisp Object-Oriented Programming System | LISP, Objects, and Symbolic Programming | Lisptalk |
| LispView | list | list comprehension |
| List Enhanced | listless | Listproc |
| lists | Listserv | Liszt |
| lite | literal | literate programming |
| literature | LITHE | lithium lick |
| LitProg | LITTLE | little-endian |
| Little Smalltalk | live data | Live Free Or Die! |
| livelock | LiveScript | liveware |
| lk | LKA | LL |
| LLC | LLGen | LLM3 |
| LLNL | LLP | LM3 |
| LMAO | LMDS | lmgtfy.com |
| LML | LM-Prolog | LMTP |
| LNF | LO | L&O |
| load | load balancing | load-bearing printf |
| lobotomy | LOC | local area network |
| Local Area Terminal | local bus | locale |
| local echo | local exchange carrier | localisation |
| localised | locality | local loop |
| local loopback addresses | Local Mail Transfer Protocol | Local Multipoint Distribution System |
| locals | Local Shared Resources | LocalTalk |
| local variable | location | Loch Ness Monster Bug |
| locked and loaded | locked up | lock-in |
| Locus | Loebner Prize | log |
| logarithmus dualis | LogC | logic |
| logical | logical address | Logical Block Addressing |
| logical complement | Logical Interchange Format | Logical Link Control |
| Logical Link Control and Adaptation Protocol | logical relation | logical shift |
| logical shift left | logical shift right | Logical Unit |
| Logical Unit 6.2 | Logical Unit Number | logic bomb |
| Logic Design Language | logic emulator | Logic for Computable Functions |
| logic gate | logic programming | Logic Replacement Technology |
| logic variable | LOGIN | log in |
| LOGISCOPE | Loglan | Loglan'82 |
| Loglan-88 | LOGLISP | LOGO |
| log off | LOGOL | logon |
| log out | Lojban | LOL |
| LOLITA | Lolli | LOM |
| longitudinal parity | Longitudinal Redundancy Check | LOOK |
| Look Ahead Left-to-right parse, Rightmost-derivation | Look ahead LR | look and feel |
| Looking Glass | LOOKS | loop |
| loop-and-a-half | loop combination | loop fusion |
| LOOPN | LOOPS | loop through |
| loose bytes | LOP | lord high fixer |
| Lore | Lorem ipsum | Lorenz attractor |
| LORIA | lose | loser |
| losing | loss | lossage |
| lossless | lossless audio compression | Lossless Predictive Audio Compression |
| lossy | lossy audio compression | lost in the noise |
| lost in the underflow | LOTIS | LOTOS |
| lots of MIPS but no I/O | Lotus 1-2-3 | Lotus Development Corporation |
| Lotus Notes | Lotus Notes Formula Language | LotusScript |
| loudspeaker | Lout | love |
| low-bandwidth | Low Bandwidth X | low earth orbit |
| Lower Layer Protocol | lower set | Low Insertion Force |
| LOWL | low-level language | low pass filter |
| Low Voltage Differential | LPAC | LPC |
| LPF | LPG | LPI |
| LPL | lpm | LP MUD |
| lpr | LPS | lp spooler |
| LPT | lr | LRC |
| LRLTRAN | LRU | ls |
| LSA | LSB | LSE |
| LSL | LSML | L-Soft |
| LSP | LSR | LSSD |
| LSYD | lt | LT-2 |
| LTL | LTPS | LTR |
| LTR3 | lu | LU6.2 |
| lub | Lubarsky's Law of Cybernetic Entomology | Lucent Technologies |
| LUCID | Lucid Emacs | Lucinda |
| Lucy | LUG | luminance |
| lump uncurrying | LUN | lunatic fringe |
| Lund Simula | Lund Software House AB | lurk |
| lurker | lurking | luser |
| Luser Attitude Re-adjustment Tool | LUSTRE | lv |
| lvalue | LVD | LWP |
| ly | LYaPAS | Lycos |
| lylafklc | lynix | LYNX |
| Lynx | LynxOS | Lynx Real-Time Systems |
| LYRIC | LZ77 compression | LZ78 compression |
| LZ compression | lzexe | lzh |
| LZH compression | LZW compression | M |
| m2 | M2toM3 | M3 |
| m4 | M5 | ma |
| MAC | Mac | Mac-1 |
| MAC-360 | MACA | MAC address |
| MACAnalyst | Macaulay | MacBinary |
| MACDesigner | macdink | MACE |
| Mach | Machiavelli | machinable |
| machine | machine code | machine cycle |
| MAchine INdependent SAIL | machine instruction | machine language |
| machine learning | Mach Interface Generator | machoflops |
| Mac II | Mac IIcx | Macintosh |
| Macintosh Common Lisp | Macintosh file system | Macintosh II |
| Macintosh IIcx | Macintosh Operating System | Macintosh user interface |
| Macintoy | Macintrash | MACL |
| MacLisp | MacMinix | Mac OS |
| Mac OS X | Mac Playmate | MacPPP |
| MACRO | macro | macro- |
| macrology | Macromedia | macro preprocessor |
| Macro SAP | macrotape | MACSYMA |
| MacTCP | MacX | MAD |
| Mad/1 | Madaline | MADCAP |
| MADTRAN | maggotbox | MAGIC |
| magic | magic bullet | magic cookie |
| magic number | Magic Paper | magic smoke |
| Magic Switch Story | Magma | Magma2 |
| MagmaLISP | magnetic disk | Magnetic Ink Character Recognition |
| magnetic stripe | magnetic tape | magnetic tape drive |
| magneto-optical disk | magneto-optical drive | magnetostrictive delay line |
| MAGNUM | Magritte | mail |
| Mail Application Programming Interface | mail bomb | mailbox |
| mail bridge | mail exchanger | Mail Exchange Record |
| mail exploder | mail filter | mail gateway |
| mail hub | mailing list | mail merge |
| mail path | mail server | Mail Transfer Agent |
| Mail Transport Agent | mail user agent | Mail Users' Shell |
| main | MAINBOL | Main Distribution Frame |
| mainframe | mainframe programmer/analyst | main loop |
| main memory | MAINSAIL | main store |
| maintainer | maintainer script | maintenance |
| Maisie | major delivery | Majordomo |
| major release | Make | Makedoc |
| makefile | Maker Interchange Format | MAL |
| Malamud | MALI | mall |
| malloc | malware | malware as a service |
| MAN | man | managed code |
| management | Management Information Base | Management Information System |
| manager/html | Manager of Business Applications | Manchester Autocode |
| Manchester encoding | Mandala | Mandelbrot, Benoit |
| Mandelbrot set | mandelbug | Mandy Rice-Davis Applies |
| manged | mangle | mangler |
| mango | MANIAC | man-in-the-middle attack |
| man page | MANTIS | mantissa |
| manual testing | Manufacturer Resource Planning | Manufacturers Automation Protocol |
| Manufacturing Automation Protocol | manularity | Many Integrated Core Architecture |
| MAO | MAP | map |
| MAPI | Maple | mapping |
| marbles | Marc Andreessen | Margaret Hamilton |
| marginal | Marginal Hacks | Maril |
| marketroid | Mark I | Markov |
| Markov chain | Markov model | Markov process |
| Markowitz | mark-sweep garbage collection | markup |
| Marlais | Mars | Marseille Prolog |
| marshaling | marshalling | MARSYAS |
| Martian | Martin Marietta Laboratories Moorestown | MARVIN |
| Mary | MAS | MASCOT |
| Mask Read-Only Memory | MASM | MasPar Unity |
| masquerading | Massachusetts Institute of Technology | massage |
| Massey Hope | Massively Multiplayer Online Game | Massively Multiplayer Online Role-Playing Game |
| master | master boot record | Matchmaker |
| Material Requirements Planning | Mathcad | Mathematica |
| Mathematical Analysis without Programming | Mathematical Analyzer, Numerical Integrator and Computer | Mathematics in Recognizable Form Automatically Compiled |
| MathJax | MATHLAB | MATH-MATIC or MATHMATIC |
| math-out | MathWorks | MATLAB |
| Matrix | Matrix Compiler | MATRIX MATH |
| Matrix Math eXtensions | MAU | Mauchly, John W. |
| mawk | maximal free expression | maximin |
| MAXIMOP | maximum Maytag mode | maximum seek time |
| maximum segment size | Maximum Transmission Unit | Maxis Software |
| MB | MBASIC | Mbogo, Dr. Fred |
| MBONE | MBps | mbps |
| MBS | MC | mc |
| MC68000 | MC68010 | MC68020 |
| MC68030 | MC68040 | MC6809 |
| MCA | MCAD | MCC |
| McCulloch-Pitts neuron | MCDBA | MCDST |
| McG360 | MCGA | MCI |
| MCI Mail | MCL | M-Code |
| MCP | MCP-1600 | MCPD |
| MCS | MCSA | MCSD |
| MCSE | mcvax | mcvert |
| MD | md | MD5 |
| MDA | MDAC | MDCT |
| MDF | MDI | MDL |
| Mean Time Between Failures | Mean Time Between Faults | Mean Time To Recovery |
| measure | measurement | meatspace |
| meatware | media | Media Access Control |
| Media Access Unit | Media Converter | Media Gateway Control Protocol |
| Medium Access Control | meeces | Meet |
| meg | mega- | megabits per second |
| megabyte | megabytes per second | megaflop |
| megaflops | MegaHertz | megapenny |
| MEGO | Mei | Mel |
| MELD | MELDC | Melinda |
| Mel Kaye | Mellor | meltdown |
| Melvin Conway | member function | membership function |
| meme | meme plague | memetic algorithm |
| memetics | Memex | memo function |
| memoisation | memoised function | memoization |
| memoized function | memory | memory address space |
| memory dump | memory farts | memory leak |
| memory location | memory management | Memory Management Unit |
| memory mapped I/O | memory protection | memory smash |
| Memory Type Range Registers | MEMS | Mentat |
| MENTOR | menu | menu bar |
| menuitis | MENYMA/S | Mercury Autocode |
| mercury delay line | MERISE | Merlin |
| MEROON | Mesa | mesh |
| MESI protocol | message | message board |
| Message Digest 5 | message digest function | Message Handling System |
| message passing | Message Passing Interface | message switching |
| Message Transfer Agent | Message Transport Agent | Messaging Application Programming Interface |
| Messaging Applications Programming Interface | mess-dos | META |
| meta | META 5 | meta bit |
| MetaCard | Meta-CASE tool | metaclass |
| Meta Class System | Meta-Crystal | metadata |
| Metadata Information Partners | META element | metafile |
| METAFONT | metaheuristic | Meta-II |
| metainformation | Meta-IV | METAL |
| metalanguage | Metal Oxide Semiconductor | Metal Oxide Semiconductor Field Effect Transistor |
| metaphone | metaprogram | metasyntactic variable |
| metasyntax | META tag | Meta-Vlisp |
| Met-English | METEOR | meter |
| method | method invocation | methodology |
| Methods | me too | metre |
| metric | metric space | Metropolitan Area Network |
| M-expression LISP | MFC | MFE |
| MFLOPS | MFM | MFTL |
| mg | MGCP | mh |
| MHDL | MHEG | MHS |
| MHz | MIB | MIB Variable |
| MIC | Mic-1 | Mic-2 |
| MICE | mice | Michigan Algorithm Decoder |
| mickey | mickey mouse program | MICR |
| micro | micro- | microarray |
| Micro Assembly Language | microcentury | Micro Channel Architecture |
| microchip art | microcode | Microcom Networking Protocol |
| microcomputer | microcontroller | MicroDroid |
| microelectromechanical system | Microelectronics and Computer Technology Corporation | MicroEmacs |
| microfloppies | microfortnight | MicroGnuEmacs |
| Micro Instrumentation and Telemetry Systems | Micro Interpreter for Knowledge Engineering | microkernel |
| microLenat | microlog | micrometre |
| Micro ML | Micron | micron |
| Micron Electronics, Inc. | Micronetics Standard MUMPS | Micro$oft |
| microperation | microphone | microPLANNER |
| Micropolis | microprocesor | microprocessor |
| Microprocessor without Interlocked Pipeline Stages | microprogramming | microReid |
| MICRO SAINT | microsecond | Microserf |
| Microslop | Microsloth Windows | Microsoft |
| Microsoft Access | Microsoft Basic | Microsoft Certified Application Developer |
| Microsoft Certified Database Administrator | Microsoft Certified Desktop Support Technician | Microsoft Certified Professional Developer |
| Microsoft Certified Solution Developer | Microsoft Certified System Engineer | Microsoft Certified Systems Administrator |
| Microsoft Certified Systems Developer | Microsoft Corporation | Microsoft Data Access Components |
| Microsoft Disc Operating System | Microsoft Disk Operating System | Microsoft DOS |
| Microsoft Excel | Microsoft Exchange | Microsoft Extended |
| Microsoft Foundation Classes | Microsoft IIS | Microsoft IntelliMouse Explorer |
| Microsoft Internet Information Server | Microsoft Mail | Microsoft Mail Application Program Interface |
| Microsoft Network | Microsoft Networking | Microsoft Office |
| Microsoft Office Small Business Edition | Microsoft Point to Point Encryption | Microsoft Project |
| Microsoft SQL Server | Microsoft Windows | Microsoft Word |
| MicroStation | microtape | Microware Corporation |
| Microwave Hardware Description Language | MIDAS | Midas |
| Midas-WWW | middle-endian | middleware |
| MIDI | mid-level network | MIF |
| MIG | MIGRAINES | MII |
| MIIS | MIKE | mil |
| Milarepa | MILITRAN | mill |
| millennium bug | millennium meltdown | milli- |
| millihelen | milliLampson | millisecond |
| MILNET | MIMD | MIME |
| mimencode | Mimer SQL | MIME type |
| MIMIC | MIMOLA | mind mouse |
| mind uploading | Minerva software | Minesweeper, Chess, Solitaire Expert |
| minicomputer | Mini Disc | minifloppy |
| minimal automaton | minimax | Mini-ML |
| minimum seek time | Mini PL/I | Ministra |
| MINITAB II | MINIX | Minnesota Internet Users Essential Tool |
| MINT | MiNT | Mint Is Not TRAC |
| Minuet | MINUIT | minus |
| minus infinity | MIPS | MIPS project |
| MIPS R2000 | MIPS R2010 | MIPS R3000 |
| MIPS R4000 | MIPS Technologies, Inc. | Miracula |
| Miranda | MIRFAC | mirror |
| mirroring | mirror site | MIS |
| misbug | MIS Director | misfeature |
| MISHAP | Missed'em-five | missile address |
| missing | miswart | MIT |
| MIT AI Lab | MITI | MITILAC |
| MIT Licence | MIT License | MIT Lisp Machine |
| MITRE Corporation | MIT Research Laboratory for Electronics | MITS |
| MIT Scheme | MIX | MIXAL |
| MIX Communications | M-JPEG | MJS |
| mk | ML | ml |
| ML-2000 | MLAB | ML/I |
| MLISP | ML Kit | MLL |
| ML-lex | ML-Linda | ML Threads |
| ML-Twig | mm | Mma |
| mmap | MMCD | MMDF |
| MMI | MML | MMO |
| MMOG | MMORPG | MMS |
| MMU | MMX | MMX technology |
| mn | mnemonic | MNP |
| mo | Mobile Subscriber Integrated Services Directory Number | Mobile Triton |
| mobo | MOBSSL-UAF | moby |
| mockingbird | Mockingboard | Mock Lisp |
| mod | mod_autoindex | modal |
| modal logic | modam | MODCAL |
| Mode | mode | mode bit |
| MODEF | MODEL | model |
| model checking | modeling | modeling language |
| modelling | modelling language | Modelsim |
| Model-View-Controller | Model-View-Presenter | modem |
| MODEM7 | moderator | Modified Frequency Modulation |
| modifier | M O drive | MODSIM |
| MODSIM II | Modula | Modula-2 |
| Modula-2* | Modula-2+ | Modula-3 |
| Modula-3* | Modula-3pi | Modula-P |
| Modula-Prolog | Modula/R | modular arithmetic |
| Modular C | MODUlar LAnguage | Modular Prolog |
| Modular SB-Prolog | module | Modulex |
| modulo | modulo arithmetic | modulo operator |
| Mohammed Al-Khawarizmi | molly-guard | monad |
| monadic | Mongolian Hordes technique | moniter |
| monitor | monkey, scratch | monkey sort |
| monkey up | Mono | monochrome |
| Monochrome Display Adapter | monoid | monotonic |
| MONSTR | Montage | Monte Carlo |
| monty | MOO | Moof |
| Moore bound | Moore graph | Moore's Law |
| moose call | MooZ | Mops |
| MORAL | more | moria |
| morphing | Morse code | MORTRAN |
| MOS | Mosaic | Mosaic Communications Corporation |
| Moscow ML | MOSFET | Mosiac |
| MOS Technologies | MOS Technology | most general unifier |
| Most Significant Bit | motd | mother |
| motherboard | Motif | Motion JPEG |
| Motion Picture Experts Group | Motorola | Motorola 14500B |
| Motorola 6800 | Motorola 68000 | Motorola 6801 |
| Motorola 68010 | Motorola 68020 | Motorola 68030 |
| Motorola 68040 | Motorola 68050 | Motorola 68060 |
| Motorola 6809 | Motorola 680x0 | Motorola 68HC11 |
| Motorola 68LC040 | Motorola 88000 | Motorola, Inc. |
| mount | Mouse | mouse |
| mouse ahead | mouse around | mouse arrest |
| mouse belt | mouse droppings | mouse elbow |
| mouse mat | mouse pad | mouse trails |
| mouso | Moving JPEG | Moving Picture Expert Group |
| Moving Picture Experts Group | Moving Pictures Experts Group | Moxie |
| Mozilla | Mozilla Foundation | Mozilla Public License |
| mp | MP1 | MP-1 |
| MP2 | MP3 | MP3Pro |
| MPC | MPC Level 1 Specification | MPC Level 2 Specification |
| MPEG | MPEG-1 | MPEG-1 audio layer 1 |
| MPEG-1 audio layer 3 | MPEG-1 layer 3 | MPEG-2 |
| MPEG-21 | MPEG-2.5 audio layer 3 | MPEG-2 AAC Low Profile |
| MPEG-2 audio layer 3 | MPEG-2 Low Sampling Frequencies Extention | MPEG-2 LSF |
| MPEG-2 MC | MPEG-2 Multi Channel Extention | MPEG-3 |
| MPEG-4 | MPEG-4 AAC Main Profile | MPEG-4 AAC SSR |
| MPEG-4 Advanced Audio Coding Scalable Sampling Rate | MPEG-4 Harmonics, individual lines and noise | MPEG-4 Harmonic Vector eXCitation |
| MPEG-4 HILN | MPEG-4 HVXC | MPEG-7 |
| MPEGplus | MPG | mpg |
| MPI | MPL | MPL II |
| MPLS | MPLS domain | MP/M |
| MPP | MPPE | MPPL |
| MPR II | M-Prolog | MPS III |
| MPSX | MPV | MPX |
| mq | MQG | mr |
| MRAM | MRDA | MRDS |
| MRI | MROC | MROM |
| MRP | MRP II | MRS |
| ms | MS Access | MSAU |
| MSB | MS-BASIC | MS-DOG |
| MS-DOS | MSG.84 | msgGUI |
| MSIE | MSM | MS Mail |
| MSN | MS Office | MS Project |
| MSS | MS-Windows | MswLogo |
| MS Word | MSX | MSX-DOS |
| mt | MTA | MTBF |
| mtc | M Technology Association | MTOS |
| MTS | MTTR | MTU |
| Mu | mu | MUA |
| MUCAL | MUD | muddie |
| Muddle | mudhead | MUD Object Oriented |
| muFP | Muhammad al-Khwarizmi | Muhammad ibn Musa al-Khwarizmi |
| Muieblackcat | mu-law | Mule |
| Mul-T | Multi-BinProlog | multiboot |
| multiC | MultiCal System | multicast addressing |
| multicast backbone | Multi-channel Memorandum Distribution Facility | multician |
| Multi-Color Graphics Array | Multics | Multics Relational Data Store |
| Multiflow Computer | Multi-Garnet | multihomed host |
| multilayer perceptron | MultiLisp | multimedia |
| Multimedia and Hypermedia information coding Expert Group | MultiMedia Compact Disc | MultiMedia Extension |
| Multimedia Integrated Conferencing for European Researchers | Multimedia Internet Mail Extensions | Multimedia Messaging Services |
| Multimedia PC | Multimedia Personal Computer | multimedia system |
| multi-part key | Multi-Pascal | multiple access |
| Multiple Access with Colision Avoidance | multiple boot | Multiple Document Interface |
| multiple inheritance | Multiple Instruction Multiple Data | Multiple Instruction/Multiple Data |
| Multiple Master | multiple perspective software development | multiple value |
| Multiple Virtual Storage | multiplexer | multiplexing |
| multiplexor | Multiplexor Channel | multiplex printer |
| Multipop-68 | multiprocessing | multiprocessor |
| multiprogramming | Multiprotocol Label Switching | Multipurpose Internet Mail Extensions |
| multiscan | MultiScheme | Multistation Access Unit |
| multisync | Multisystem eXtention Interface Bus | multitasking |
| Multi-tasking Program for Microcomputers | multithreaded | multithreading |
| MultiTOS | multi-user | Multi-User Dimension |
| Multi-User Dungeon | Multi-User Shared Hallucination | Multi-Version Concurrency Control |
| multi-way branch | MuMath | mumblage |
| mumble | mumble mode | MUMPS |
| munch | munching | munching squares |
| munchkin | mundane | mung |
| munge | MUP | MU-Prolog |
| Murphy's Law | Muse | museum |
| MUSH | Music | Musical Instrument Digital Interface |
| Musicam | MuSimp | MUSL |
| mutant | Mutation Testing | MuTeX |
| mutex | mutter | mutual exclusion |
| mutually recursive | mutual recursion | mux |
| mv | MV* | MVC |
| MVCC | MVP | MVS |
| MVS/ESA | MVS/OE | MVS/Open Edition |
| MVS/SP | MVS/XA | mw |
| MX | mx | MXI |
| MXIbus | MX Record | my |
| My Favourite Toy Language | MYOB | MySpace |
| MySQL | MySQL AB | MYSTIC |
| MZ | mz | N |
| N10 | na | nadger |
| NAG | Nagling Coalescence | nagware |
| nailed to the wall | nailing jelly | naive |
| naive user | NAK | name capture |
| named | named pipe | name resolution |
| name service switching | namespace | naming convention |
| NaN | NAND | nano- |
| nanoacre | nanobot | nanocomputer |
| nanofortnight | nanometre | nanosecond |
| nanotechnology | Napier | NAPLPS |
| NAPSS | narrowband | narrowing |
| NAS | nasal demons | NASI |
| nastistical | NASTRAN | nastygram |
| NAT | Nathan Hale | National Advanced Systems |
| National Bureau of Standards | National Center for Supercomputing Applications | national characters |
| National Database Language | National Information Infrastructure | National Information Services and Systems |
| National Institute of Standards and Technology | National Research and Education Network | National Science Foundation |
| National Science Foundation Network | National Semiconductor | National Semiconductor 32000 |
| National Software Reuse Directory | National Spatial Data Infrastructure | National Television Standards Committee |
| native compiler | Native Language System | NATURAL |
| natural deduction | Natural English | natural language |
| Natural Language Information Analysis Method | natural language processing | natural number |
| nature | NAU | nav bar |
| navigating | navigation | navigation bar |
| Navigator | Nawk | NB |
| NBFCP | NBS | NBT |
| NC | nc | NCD |
| NCP | NCR Corporation | NCRL |
| NCR Language | NCS | NCSA |
| ND | NDIS | NDL |
| NDS | ne | neat hack |
| neats vs. scruffies | Nebula | NEC |
| NEC 780-C | needs assessment | neep-neep |
| negation by failure | negative acknowledgement | neighborhood bike code |
| NELIAC | Neon | neophilia |
| Neptune | nerd | Nerd pride |
| NERECO | NESL | nested class |
| net | net.- | netaddress |
| NetBEUI | NetBIOS | NetBIOS Frames Control Protocol |
| NetBios over TCP/IP | NetBOLLIX | NetBSD |
| netbui | netburp | netCDF |
| Netcom On-line Communication Services, Inc. | netdead | Netfind |
| net.god | NetHack | netiquette |
| NETL | netlag | NetLingo |
| netload | Netmarq Limited | netmask |
| NetNanny | netnews | net.personality |
| netpipes | net.police | netquette |
| Netrek | netrock | Netscape |
| Netscape Communications Corporation | Netscape Navigator | Netscape Public License |
| netsplit | netstat | netter |
| NetWare | NetWare Core Protocol | Netware Directory Services |
| Netware Input/Output Subsystem | NetWare Link State Protocol | network |
| network address | Network Addressable Unit | Network Address Translation |
| Network Address Translator | Network Administrator | Network Application Support |
| Network Attached Storage | network byte order | network card |
| network closet | Network Computing Devices | network database |
| Network Definition Language | Network Device Interface Specification | network engineer |
| Network extensible Window System | Network File System | Network Filing System |
| Network Information Center | Network Information Service | Network Information System |
| networking | network interface card | network interface controller |
| network layer | network layer reachability information | network management |
| network meltdown | Network News Transfer Protocol | network node |
| Network Node Interface | network number | Network Operating System |
| network operating system | Network Operations Center | network operator |
| network redirector | network segment | Network Solutions, Inc. |
| network storm | Network Termination | network, the |
| Network Time Protocol | network topology | network transparency |
| NetX | Net:X | neural nets |
| neural network | neuron | Neutral Interconnect |
| neutrosophic | neutrosophic logic | neutrosophic probability |
| neutrosophic set | neutrosophic statistics | Neutrosophy |
| Never Offline | newbie | New Flavors |
| newgroup wars | New Jersey | newline |
| NEWP | NEW Programming language | NeWS |
| news | NewsClip | newsfroup |
| newsgroup | newsletter | Newspeak |
| Newsqueak | news reader | New Storage System |
| new talk | New Testament | Newton |
| Newton-Raphson iteration | Newton's method | NewWave |
| NewYacc | New York State Educational Reasearch ETwork | New York University |
| NEXOR | Nexpert Object | NeXT, Inc. |
| Next Program Counter | NEXTSTEP | nf |
| NFA | NFQL | NFR |
| NFS | NFT | ng |
| NGL | NHOH | ni |
| NIAL | NIAL Systems Ltd. | NIAM |
| nibble | Nibble Mode DRAM | NIC |
| NIC.DDN.MIL | NICE | nick |
| nickle | NICOL I | NIFOC |
| Nightmare File System | night mode | NIH |
| NIHCL | NII | NIKL |
| Niklaus Wirth | NIL | niladic |
| Ninety-Ninety Rule | Nintendo | NIOS |
| nipple | NIS | NISO |
| NISS | NIST | NJCL |
| nl | NLANR | NLM |
| NLP | NLRI | NLS |
| NLSP | NLX | NMI |
| nML | NMU | NN |
| nn | NNI | NNTP |
| no | NOC | NODAL |
| Nodal Switching System | noddy | node |
| Node.js | Node Package Manager | noise |
| noise margin | noise shaping | NOL |
| NOMAD | NOMEX underwear | Nominal Semidestructor |
| non-algorithmic procedure | non-constructive proof | nondeterminism |
| nondeterministic | nondeterministic automaton | nondeterministic polynomial time |
| Nondeterministic Turing Machine | non-impact printer | non-interlaced |
| nonintrusive testing | nonlinear | Non-Maintainer Upload |
| Non-Maskable Interrupt | non-optimal solution | Nonpareil |
| non parity | non-polynomial | Non Return to Zero Inverted |
| nontrivial | Non-Uniform Memory Access | non-uniform quantising logarithmic compression |
| Non-Uniform Rational B Spline | non-volatile | non-volatile memory |
| Non-Volatile Random Access Memory | non-volatile storage | noob |
| no-op | NOR | NORC COMPILER |
| NorCroft | NORD PL | NORDUnet |
| norm | normal distribution | normal form |
| normalisation | normalised | normal order reduction |
| normed space | northbridge | NorthWestNet |
| NOS | NOT | Not-a-Number |
| notebook | NoteCards | Notepad |
| Notes | Nother | not ready for prime time |
| notspot | notwork | Nova |
| Novell Data Systems | Novell DOS | Novell, Inc. |
| Novell NetWare | NOWEB | no-write allocation |
| NP | np | NPC |
| NP-complete | NP-hard | NP-hilarious |
| NPL | npm | NPPL |
| N-Prolog | NP time | NP tricky |
| NQS | Nqthm | nr |
| NREN | nroff | NRZ |
| NRZI | ns | NS16000 |
| NS32000 | NSA line eater | NSAPI |
| NSDI | NSE | NSF |
| NSFIP | NSFNET | NSI |
| nslookup | NSRD | NSS |
| NT | NT1 | NT5 |
| ntalk | NTAS | NT File System |
| NTFS | n-tier | NTIS |
| NTMBS | NTP | NTSC |
| NTU | nu | NuBus |
| nu-calculus | NUCLEOL | nude |
| nuke | null | nullary |
| null modem | null-terminated multibyte string | NUMA |
| Number 5 Electronic Switching System | number crunching | number keys |
| numbers | number sign | numeric keypad |
| Numeris | Nuprl | NU-Prolog |
| nurbs | Nu Thena | nut loose on keyboard |
| NUXI problem | NVL | NVRAM |
| NVS | NWNET | NYAP |
| nybble | nyet.gif | nyetwork |
| nym | nym server | Nyquist frequency |
| Nyquist Theorem | NYSERNET | NYU OMNIFAX |
| nz | O | O2 |
| Oaklisp | OAP | OASIS Open Document Format for Office Applications |
| OATH | Ob- | OBDC |
| OBE | Oberon | Oberon-2 |
| Oberon-V | OBEX | obfuscated |
| Obfuscated C Contest | obi-wan error | OBJ |
| OBJ0 | OBJ2 | OBJ3 |
| object | ObjectBroker | ObjectCenter |
| Object CHILL | object code | Object-code Buffer Overrun Evaluator |
| Object Compatibility Standard | Object Constraint Language | Object Database Management Group |
| Object Data Management Group | Objecteering | Object Exchange |
| objectfuscated code | object identifier | Objectionable-C |
| Objective C | Objective CAML | Objective Modula-2 |
| Objective PASCAL | Object Linking and Embedding | Object Lisp |
| ObjectLOGO | Object Management Group | Object management system |
| object method | Object Modelling Technique | Object Oberon |
| object-orientation | object-oriented | object-oriented analysis |
| object-oriented database | object-oriented design | Object-Oriented Fortran |
| object-oriented language | Object-Oriented Pascal | object-oriented polymorphism |
| object-oriented programming | object-oriented programming language | Object-oriented SQL |
| Object-Oriented Turing | Objectory | ObjectPAL |
| Object Pascal | Object Persistence Framework | object relational mapping |
| object relational modelling | Object Request Broker | Object Role Modeling |
| Object Value | Objectworks | Object Z |
| Objlog | OBJT | ObjVlisp |
| ObjVProlog | Obliq | oblique stroke |
| Oblog | OBOE | OBSCURE |
| observational equivalence | Oc | OC-12 |
| OC-3 | OC-48 | OCAL |
| occam | occam 2 | Occam's Razor |
| occlude | occurs check | OCL |
| OCLC | OC-n | OCODE |
| OCP | OCR | OCS |
| octal | Octave | octet |
| octothorpe | OCX | OD390 |
| ODA | ODBC | ODC |
| Ode | ODI | ODIF |
| ODMA | ODMG | odometry |
| ODP | ODS | ODSA |
| ODT | OEM | OFA |
| off-by-one error | Office | office automation |
| Office By Example | Office Workstations Limited | Official Production System |
| off-line | off-line world | offset |
| offshoring | off-side rule | off the trolley |
| ogg | Ogg Vorbis | OHCI |
| Ohm | Ohm, Georg Simon | ohnosecond |
| OIC | OID | OIL |
| OLAP | OLAP Council | OLC |
| OLDAS | old fart | old talk |
| Old Testament | OLE | OLE custom controls |
| OLE DB | OLE for Process Control | OLGA |
| Olivetti | O-Logic | OLTP |
| OLWM | om | OMA |
| Omega | Omega-algebraic | Omega test |
| OMF | OMG | OMNICODE |
| OMNIFAX | OMNITAB | OMR |
| OMS | OMT | OMTool |
| ONC | Ondine | one |
| one-banana problem | one-dimensional array | one-line fix |
| one-liner wars | ones complement | One-Time Password |
| One Time Programmable Read-Only Memory | one-way function | one-way hash function |
| on-line | On-Line Analytical Processing | Online Computer Library Center, Inc. |
| On-Line Computer system | Online Media | On-line Process Synthesizer |
| Online Public Access Catalog | On-Line Transaction Processing | Ontic |
| onto | ontology | OnX |
| OO | OOA | OOD |
| OODB | OODBMS | OOF |
| OOGL | OOo | OOP |
| OOPL | OOPS | OOPSLA |
| OOSD | OOZE | op |
| OPAC | Opal | OPC |
| op code | open | open box testing |
| open brace | OpenBSD | open/closed principle |
| open-collar worker | Open DataBase Connectivity | Open Data-link Interface |
| Open DeathTrap | Open Desktop | Open Distributed Processing |
| Open Distributed System Architecture | OpenDoc | OpenDocument |
| Open Document Architecture | Open Document Interchange Format | Open Document Management API |
| OpenGL | Open Graphics Library | Open Group |
| OpenInsight | open interval | Open Look |
| Open Network Computing | OpenOffice.org | open parenthesis |
| Open Prolog | Open Scripting Architecture | Open Search |
| Open Shortest-Path First | Open Shortest-Path First Interior Gateway Protocol | Open Software Foundation |
| open source | Open Source Definition | Open Source Initiative |
| Open source license | OpenStep | open switch |
| Open System Architecture | Open Systems Interconnect | Open Systems Interconnection |
| Open Telecom Platform | Open Trading Protocol | OpenTransport |
| Open University | OpenVMS | OpenWindows |
| operand | operating | operating system |
| Operating System/360 | Operating System/Multiprogramming of Fixed Tasks | operational database |
| Operational Data Store | operational requirements | operational semantics |
| operational test and evaluation | operational testing | operation code |
| operations support technician | operator | Operator Control Language |
| operator overloading | OPF | Opportunity Management System |
| OPS | OPS5 | OPS83 |
| Optical Carrier 12 | Optical Carrier 3 | Optical Carrier 48 |
| Optical Carrier n | Optical Character Recognition | optical computing |
| optical diff | optical disc drive | optical disk drive |
| optical drive | optical fiber | optical fibre |
| optical grep | Optical Mark Reader | optical mouse |
| Optical Signal Processor | optical storage | Optical Storage Technology Association |
| Optical Time Domain Reflectometer | Optical Time Domain Reflectometry | optimal |
| Optimal Flexible Architecture | optimise | optimising compiler |
| optimism | optimize | option |
| OPTRAN | Opus | OR |
| Oracle | Oracle 7 | Oracle Card |
| Oracle*CASE | Oracle Co-operative Applications | Oracle Corporation |
| Oracle Parallel Server | Oracle Rdb | Oracle Toolkit |
| Orange Book | ORB | Orbit |
| Orca | Order Code Processor | order-embedding |
| ordering | ordinal | ordinary differential equation |
| ordinate | OREGANO | O'Reilly and Associates |
| org | Organic Mode | Orient84/K |
| Original Equipment Manufacturer | ORKID | ORM |
| orphaned i-node | orphan process | ORTHOCARTAN |
| orthogonal | orthogonal instruction set | Orwell |
| OS | OS2 | OS/2 |
| OS/360 | OS/390 | OS-9 |
| OSA | OSA extension | OSAX |
| Osborne 1 | Osborne, Adam | Osborne Computer Corporation |
| OSCAR | OSD | OSE |
| OSF | OSI | OSI Model |
| OSI Reference Model | OSI-RM | OSI seven layer model |
| O'small | OS/MFT | OS/MVT |
| OSP | OSPF | OSQL |
| OSSL | OSTA | OS/VS1 |
| OS/VS2 | OT | OTDR |
| OT&E | OTI | OTOH |
| OTP | OTPROM | OTT |
| Ottawa Euclid | Ousterhout, John K. | Ousterhout's dichotomy |
| Ousterhout's fallacy | Ousterhout's false dichotomy | out |
| outer join | outline font | out-of-band |
| output | output device | Outside Awareness Port |
| outside-in testing | outsourcing | overclocking |
| Overdrive | overflow | overflow bit |
| overflow flag | overflow pdl | overhead |
| overloading | overriding | overrun |
| overrun screw | overuse strain injury | OWHY |
| OWL | Owl | Ox |
| Oz | oz | Oz-Email |
| P+ | P1754 | p2c |
| P2P | P3L | P4 |
| P6 | pa | PABX |
| PACE | Packard Bell Electronics, Inc. | packed decimal |
| Packed Encoding Rules | packet | Packet Assembler/Disassembler |
| packet driver | Packet in Plastic Grid Array | Packet InterNet Groper |
| packet radio | packet sniffer | packet sniffing |
| packet switch | packet-switched | packet switching |
| Packet Switch Node | packet writing | PackIt |
| PACT I | PACTOLUS | PAD |
| padded cell | Paddle | PAGE |
| page | paged | Page Description Language |
| Paged Memory Management Unit | page fault | page in |
| pagelet | page mode | Page Mode DRAM |
| Page Mode Dynamic Random Access Memory | page out | pager |
| paging | PaiLisp | pain in the net |
| Paintbrush | PAISley | Pajek |
| PAL | Palace | palette |
| palmtop | Palo Alto Research Center | Palo Alto Research Centre |
| PAM | Pam | Pandora |
| panic | PANON | PANS |
| Pansophic | Pantone | PAP |
| Paper Feed Control Character | papermail | paper-net |
| paper tape | paraconsistent probability | PARADE |
| PARADIGM PLUS | Paradigms of AI Programming | Paradise |
| Paradox | paradox | Paradox Application Language |
| Paragon | Paralation | Paralation C |
| Paralation LISP | ParAlfl | Parallaxis |
| parallel | Parallel Advanced Technology Attachment | Parallel ATA |
| Parallel C | parallel computer | parallel computing |
| Parallel FORTH | Parallel Fortran | Parallel Haskell |
| parallelism | Parallel Pascal | parallel port |
| Parallel Presence Detect | parallel processing | parallel processor |
| parallel random-access machine | parallel reduction | Parallel Server Option |
| Parallel SML | Parallel Sysplex | Parallel Virtual Machine |
| param | parameter | parameter RAM |
| parametric polymorphism | paraML | paranoid programming |
| ParaSoft Corp | Parasol | PARC |
| ParcPlace Systems | parent | parentheses |
| parent message | parent process | Pari |
| Paris | parity | parity bit |
| parity error | Parkinson's Law of Data | Park-Miller |
| Parlance | Parlog | Parlog++ |
| parm | PARMACS | ParMod |
| PARS | parse | PARSEC |
| parsed | parser | parser generator |
| parsing | Parsley | Partial Differential Equation LANguage |
| partial equivalence relation | partial evaluation | partial function |
| partial key | partially ordered set | partial order |
| Partial Response Maximum Likelihood | partition | partitioned data set |
| PARTS | PARULEL | PASC |
| Pascal | Pascal- | Pascal-80 |
| Pascal+CSP | Pascal-F | Pascal-FC |
| Pascal/L | Pascal-Linda | Pascal-m |
| Pascal-P | Pascal P4 | Pascal Plus |
| Pascal/R | Pascal-S | Pascal-SC |
| pasos2 | Pasqual | PASRO |
| PASSIM | passive matrix display | passphrase |
| passw0rd | password | Password Authentication Protocol |
| paste | pastie | PAT |
| PATA | patch | patch pumpkin |
| patch space | PATCHY | path |
| path coverage testing | pathname | pathname separator |
| pathological | Path Pascal | pathspec |
| pattern matching | pattern recognition | PAW |
| PAW++ | payware | PB Cache |
| PBCAK | PBD | PBEM |
| PBKAC | PBM | PBX |
| PC | pC++ | PC-1834 |
| PC200 | PC-7150 | PCA |
| P-CAD | PC AT | PCB |
| PC Card | PCCTS | PCF |
| PCI | PCI bus | PCI Configuration Utility |
| PCI Mezzanine Card | PCI slot | PC-ism |
| PCjr | PCL | PCLIPS |
| PCM | PCMCIA | PCMIA |
| PCN | PC-NFS | P-code |
| PC Pursuit | PC-RT | PCS |
| PC-Scheme | PCS/Geneva | PC support |
| PC-TALK III | PCTE | PCTE+ |
| PC-TILES | PCU | PC-ware |
| pcx | PD | PDA |
| PDC | PDC Prolog | PDEL |
| PDELAN | PDES | PDF |
| PDFTeX | PDH | PDIL |
| pdksh | PDL | PDL2 |
| PDM | PDP | PDP-10 |
| PDP-11 | PDP-20 | PDP-6 |
| PDP-7 | PDP Assembly Language | PDS |
| PDSA cycle | PDS/MaGen | PDU |
| PE | pe | PeaceNet |
| peak envelope power | Peano | Peano arithmetic |
| PEARL | Pebble | Pebbleman |
| PEBCAK | PEBKAC | PECOS |
| Pedagogic Algorithmic Language | PEEK | PEEL |
| peephole optimisation | peephole optimization | peer |
| peer-to-peer | peer-to-peer network | Pegasus |
| PEIPA | PEM | PENCIL |
| pencil and paper | penis war | Pentium |
| Pentium 2 | Pentium 3 | Pentium II |
| Pentium III | Pentium II Xeon | Pentium Pro |
| peon | PeopleSoft | PEP |
| Pepper | PEPsy | PER |
| percent | Perceptional Adaptive Subband Coding | perceptron |
| percussive maintenance | perf | perfect programmer syndrome |
| PERFORM | period | periodic group |
| peripheral | Peripheral Component Interconnect | peripheral device |
| Peripheral Technology Group | Perl | Perl5 |
| perl-byacc | Perl profiler | permanent link |
| Permanent Virtual Circuit | Permanent Virtual Connection | permission |
| permutation | perplexity | persistence |
| persistent | Persistent Functional Language | persistent memory |
| Personal Communication Network | Personal Communication Services | personal computer |
| Personal Computer Memory Card International Association | Personal Digital Assistant | Personal Identification Number |
| Personalized Array Translator | person of no account | perspective |
| PERT | pessimal | pessimising compiler |
| peta- | petabyte | petaflops |
| petdingo | Peter P. Chen | Petri net |
| PETSCII | PEX | pf |
| PFE | PFL | pfm |
| pForth | Pfortran | PFP |
| pg | PGA | PGA370 |
| PGP | PH | pH |
| ph | phacker | phage |
| phase | phase alternating line | Phase Encoded |
| phase of the moon | phase-shift keying | phase space |
| phase-wrapping | PHIGS | Philip R. Bagley |
| Philips | Philips SCC68070 | Phil Katz |
| philosophy | phishing | PHOCUS |
| Phoenix | phone freaking | phone mail |
| phone phreaking | Phonetastic | Phong shading |
| phosphor fatigue | photo CD | Photoshop |
| PHP | PHP: Hypertext Preprocessor | phpmyadmin |
| phreak | phreaking | physical |
| physical address | physical addressing | physical file |
| physical layer | physical memory | physical memory address |
| Physical Sequential | Physical Transport Network | Physics Analysis Workbench |
| PI | pi | PIC |
| pi-calculus | Pick BASIC | PICL |
| PICNIC | pico- | picosecond |
| PICS | PICT | PicTeX |
| pictogram | pictograph | Pictorial Janus |
| picture | picture element | Picture Quality Scale |
| PID | pidgen+ | Pidgin |
| PIE | pif | piggybacking |
| pig, run like a | PIGUI | PIL |
| PILE | PIL/I | PILOT |
| pilot error | Pilot European Image Processing Archive | PIM |
| PIN | PINBOL | Pine |
| pin feed | ping | ping command |
| ping-flood | pinging | ping-pong |
| Pin Grid Array | Pink-Shirt Book | pin-out |
| PIO mode | PIP | pipe |
| pipeline | pipeline break | Pipeline Burst Cache |
| pipelined | Pipelined Burst Cache | pipeline stall |
| pipelining | PIPEX Ltd. | piping |
| piracy | pirate | PIRL |
| pistol | PIT | PITA |
| pixel | pixels per inch | pixmap |
| pizza box | PJPEG | PK |
| pk | PKE | PKI |
| PKLITE | PKUNZIP | PKWARE, Inc. |
| PKZIP | pl | PL1 |
| PL/1 | PL-11 | PL360 |
| PL516 | PL-6 | PL.8 |
| Pla | PLACE | PLAGO |
| plaid screen | PLAIN | plain ASCII |
| Plain Old Documentation | Plain Old Telephone Service | Plain Old Telephone System |
| plain TeX | plaintext | PLAN |
| Plan 9 | Planet | plan file |
| PLANIT | Plankalkül | PLANNER |
| Planner-73 | PLANS | plants |
| PLASMA | Plastic Pin Grid Array | platform |
| Platform for Internet Content Selection | Platform Independent Graphical User Interface | platinum-iridium |
| Platon | PLAY | play by electronic mail |
| Playground | Play, Inc. | playpen |
| Playstation | playte | PLC |
| PL/C | PL Cornell | PLD |
| plenum cable | pleonasm | plesiochronous |
| Plesiochronous Digital Hierarchy | Pleuk grammar development system | Plexus |
| PL/I | PL/I-FORMAC | pling |
| plingnet | PLisp | PL/I SUBSET |
| PL/I Subset G | PLITS | PLL |
| PL/M | PLMK | plokta |
| plotter | PL/P | PL/PROPHET |
| PL/S | PL/Seq | PL/SQL |
| PLTL | plug and play | plug and pray |
| Plug Compatible Manufacturer | Pluggable Authentication Module | plugh |
| plug-in | PLUM | Plumber |
| plumbing | Plural EuLisp | PLUS |
| plus | PLUSS | ply |
| PM | pm | pm2 |
| P-mail | PMBX | PMC |
| PML | PMP | pn |
| pnambic | PNG | PNP |
| PNU-Prolog | POA | PoB |
| POC | POCAL | pocket calculator |
| pocket computer | pod | P.O.D. |
| podcast | POE | POFAC |
| POFOD | POGO | point |
| point-and-drool interface | point-and-grunt interface | pointed domain |
| pointer | pointer swizzling | pointing device |
| pointing stick | Point Of Contact | point of presence |
| point of sale terminal | Point-to-Point Protocol | Point-to-Point Protocol over ATM |
| Point-to-Point Protocol over Ethernet | Point-to-Point Tunneling Protocol | Poisson distribution |
| POJO | poke | Pokémon exception handling |
| Polka | poll | polling |
| Poly | polygon pusher | POLYGOTH |
| polylithism | Poly/ML | polymorphic |
| polymorphic lambda-calculus | polymorphism | polynomial |
| polynomial-time | polynomial-time algorithm | polyvinyl chloride |
| POM | pompom | Ponder |
| Pong | POOL | POOL2 |
| POOL-I | Pooling Agreement for Technical Assistance | POOL-T |
| POP | PoP | pop |
| POP++ | POP-1 | POP-10 |
| Pop-11 | POP-2 | POP3 |
| POP-9X | POPART | POPCORN |
| pop-down menu | POPJ | Poplar |
| POPLER | POPLOG | POPLOG ML |
| POP server | PopTalk | PopularitY of Programming Languages |
| POR | porn | porno |
| pornography | port | portability |
| portable | Portable AIRTIME | Portable Commodore 64 |
| Portable Common Loops | Portable Common Tool Environment | portable computer |
| Portable Document Format | Portable Forth Environment | Portable Network Graphics |
| Portable Object Adapter | Portable Operating System Interface | Portable Pixmap |
| Portable Scheme Debugger | Portable Scheme Interpreter | Portable Standard Lisp |
| Portable Tool Interface | Port Address Translation | PORTAL |
| portal | porting | Port Language |
| portmapper | port number | POS |
| POSE | poset | positional representation |
| POSIX | POSIX Threads | POST |
| post | postcardware | posted write-through |
| Postel, Jon | postfix notation | postfix syntax |
| POSTGRES | PostgreSQL | posting |
| postmaster | post office problem | Post Office Protocol |
| post-order traversal | POSTQUEL | PostScript |
| Postscript point | Post, Telephone and Telegraph administration | POSYBL |
| potential difference | POTS | pound |
| pound on | pound sign | POWER |
| PowerBuilder | power cycle | powerdomain |
| PowerFuL | power hit | Power Mac |
| Power Macintosh | power-on reset | power-on self-test |
| PowerOpen | PowerOpen Association | PowerOpen Environment |
| PowerPC | PowerPC 601 | PowerPC G3 |
| PowerPC Platform | PowerPC Reference Platform | Powerpoint |
| power save mode | powerset | Powersoft Corporation |
| power supply | power supply unit | PP96 |
| PPC | PPCP | PPD |
| PPGA | ppi | PPL |
| PPLambda | PPM | PPN |
| PPP | PPPoA | PPPoE |
| P-Prolog | PPTP | PQS |
| PR | pr | pr0n |
| PRA | pragma | PRAM |
| Praxis Critical Systems | pre\box | PRE-CC |
| PRECCX | precedence | precedence lossage |
| precharge | precision | predecessor |
| predicate calculus | predicate logic | predict |
| predomain | pre-emptive multitasking | prefetch |
| prefix | prefix notation | prefix syntax |
| pre-order | pre-order traversal | PREP |
| prepaging | prepend | preprocessor |
| pre-sales support rep | presence detect | presentation layer |
| Presentation Manager | prestidigitization | PRESTO |
| Pretty Amazing New Stuff | Pretty Good Privacy | pretty pictures |
| prettyprint | pretzel key | preventive maintenance |
| PRI | primary cache | Primary Domain Controller |
| primary key | primary management domain | Primary Rate Interface |
| primary storage | Prime Computer | Primenet, Inc. |
| prime number theorem | prime time | primitive |
| Princeton University | principal type | PRINT |
| printed circuit board | printer | Printer Access Protocol |
| printer port | printf | PRINT I |
| printing discussion | print server | Print Services Facility |
| priority inheritance | priority interrupt | priority inversion |
| priority queue | priority scheduling | PRISM |
| Prisoner of Bill | privacy | Privacy Enhanced Mail |
| private | Private Automatic Branch eXchange | Private Branch Exchange |
| private key | private-key cryptography | Private Manual Branch eXchange |
| privileged instruction | PRL | PRMD |
| PRML | probabilistic | probabilistic automaton |
| Probability of Failure on Demand | Probe | problem state |
| Problem Statement Language/Problem Statement Analyser | PROC | procedural |
| procedural language | Procedural Language/SQL | procedure |
| proceedings | process | Process and Experiment Automation Real-Time Language |
| process data | Process Design Language 2 | process ID |
| process identifier | processing | processor |
| Processor Direct Slot | processor farm | Processor System Modeling Language |
| processor time | process scheduling | process table |
| PROCOL | Procomm | Procrustean string |
| Prodigy | ProDoc | product |
| production system | Professional Graphics Adapter | Professional Office System |
| professional programming | professional services | PROFILE |
| profile | PROFS | PROGENY |
| proglet | program | Program Composition Notation |
| program counter | Program Design Language | Program Evaluation and Review Technique |
| Program Information File | Programmable Airline Reservation System | Programmable Array Logic |
| Programmable Interrupt Controller | Programmable Logic Controller | Programmable Read-Only Memory |
| Programmed Data Processor | PROgrammed Graph REwriting Systems | programmer |
| Programmer Brain Damage | Programmer's Cheer | Programmers Hierarchical Interactive Graphics System |
| PROgrammer's Microapplication Language | Programmer's Switch | programming |
| programming fluid | programming language | Programming Language/Cornell |
| Programming Language/Systems | Program Temporary Fix | program transformation |
| Prograph | PROGRES | progressive coding |
| Progressive JPEG | progressive/sequential coding | PROJECT |
| project assurance | Project Athena | Project Guardian |
| projection | projective plane | Project MAC |
| project management | project planning | Prolog |
| Prolog++ | Prolog-2 | Prolog-D-Linda |
| Prolog-II | Prolog-III | Prolog-Linda |
| Prolog/Mali | PROM | PROMAL |
| Prometheus | promiscuous mode | PROM monitor |
| pron | Pronet | Pronunciation |
| proof | PROOF/L | proof theory |
| propeller head | propeller key | proportionally spaced font |
| Proposal Writing | proposition | propositional calculus |
| propositional logic | Proposition of a Language Useable for Structured Specifications | proprietary |
| PROSE | ProSet | PROSPER |
| Prospero | ProTalk | protected mode |
| PROTEUS | protocal | protocol |
| protocol analyser | protocol converter | Protocol Data Unit |
| protocol layer | protocol stack | protoduction |
| PROTON | Protosynthex | prototype |
| Prototyper | prototyping | provably difficult |
| provably unsolvable | provider | provocative maintenance |
| prowler | proxy | proxy ARP |
| proxy gateway | Proxy Server | proxy server |
| PS | PS1 | PS2 |
| PS/2 | PS 440 | PSA |
| PS-ALGOL | pSather | PSD |
| PSDN | pseudo | pseudocode |
| pseudoprime | pseudorandom number | PseudoScheme |
| pseudosuit | pseudo-tty | PSF |
| PSI | Psion | Psion Organiser |
| PSK | PSL | PSL/PSA |
| PSML | PSN | PSO |
| PSPP | PSTN | PSU |
| psychedelicware | psyton | pt |
| P-TAC | ptc | PTF |
| Pthreads | PTI | PTN |
| Ptolemy | PTT | PUB |
| pub | public directory | public domain |
| public domain software | public-key cryptography | Public-Key Cryptography Standards |
| public-key encryption | Public Key Infrastructure | Public Switched Telephone Network |
| PUBlishing | puff | PUFFT |
| pull | pull-down list | pull-down menu |
| pull media | Pulse Code Modulation | pumpkin |
| pumpkineer | pumpking | punch card |
| punched card | punt | Purdue Compiler-Construction Tool Set |
| Purdue University | pure functional language | pure lambda-calculus |
| PureLink | Pure Lisp | purely functional language |
| Purify | Purple Book | purple wire |
| Purveyor | push | push-button |
| Push Down List | push media | P value |
| PVC | PVM | PV-WAVE |
| pw | PWM | py |
| PYPL | Pythagoras | Pythagoras's Theorem |
| Pythagoras' Theorem | Pythagorean Theorem | Python |
| Q | QA | qa |
| QA4 | QAM | Qbasic |
| QBE | QBIC | QCA |
| QCIF | qdjanus | QDOS |
| QEMM386 | QIC | QL |
| Qlambda | QLISP | QLOG |
| QMQP | QMTP | QMW |
| Q'NIAL | QNX | QoS |
| QPE | QSAM | QT-OBJECTS |
| QTRADER | quad | Quadralay Corporation |
| Quadrature Amplitude Modulation | quadruple bucky | quadruplex |
| Quake | Qualcomm | quality |
| quality assurance | quality control | quality of service |
| Quality Systems & Software Ltd. | quantifier | Quantify |
| quantum | quantum bogodynamics | quantum cell |
| quantum cell wire | quantum computer | quantum computing |
| quantum dot | Quantum-dot Cellular Automata | quarter |
| Quarter CIF | Quarter Inch Cartridge | Quay Financial Software |
| QUEASY | Queen Mary and Westfield College | Queens Problem |
| Queens Puzzle | Queen's University | QUEL |
| query | Query By Example | query by image content |
| query expansion | ques | Quest |
| question mark | queue | Queued Sequential Access Method |
| QUICK | quick-and-dirty | QuickDraw |
| Quick Mail Queueing Protocol | Quick Mail Transfer Protocol | Quicksilver |
| Quicksort | QuickTime | quiesce |
| quiesce time | QUIKSCRIPT | QUIKTRAN |
| QUIN | quine | Quintec-Objects |
| quintillion | Quintus Prolog | quote chapter and verse |
| quotient | Qu-Prolog | Quty |
| qux | QWERTY | QX |
| R2000 | R2RS | R3.99RS |
| R3RS | R4RS | rabbit job |
| RACE | race condition | RACF |
| RAD | Raddle | Radio-frequency identification |
| Radio Frequency Interference | radio in the loop | radiosity |
| RADIUS | radix | RAID |
| RAIL | rainbow series | rain dance |
| RAIS | RAISE | RAISE Specification Language |
| RAL | RAM | Rambus DRAM |
| Rambus, Inc. | RAMDAC | RAM disk |
| RAM drive | RAMIS II | RAMTRON |
| random | random-access memory | Random Access Memory Digital-to-Analog Converter |
| randomness | random number | random testing |
| range | ransomware | Rapid Application Development |
| RapidCAD | Rapidly Extensible Language, English | rapid prototyping |
| Rapidwrite | RAPT | RARE |
| rare mode | RARP | RAS |
| RASP | raster | raster blaster |
| raster burn | raster font | rastergram |
| raster graphics | Raster Image Processor | rasterising |
| rasterizing | raster subsystem | Ratatosk |
| rat belt | RatC | RATEL |
| Rate monotonic scheduling | RATFIV | RATFOR |
| rational | RATional Fortran | Rationalized C |
| rave | rave on! | ravioli code |
| raw data | raw mode | RAWOOP-SNAP |
| ray casting | Rayleigh distribution | Ray Tomlinson |
| ray tracing | R:BASE | RBASIC |
| RBCSP | RBOC | rc |
| RC4 | RCA 1802 | RCA 1805 |
| RCC | rc file | RCL |
| rcp | RCS | Rdb |
| rdb | RDBA | RDBMS |
| RDF | RDI | RDL |
| RDOS | RDP | RDRAM |
| RDS | RE | re |
| read-eval-print loop | README file | Read-Only Memory |
| read-only user | real | RealAudio |
| real estate | real hack | reality check |
| realization | Really Simple Syndication | real mode |
| real number | real operating system | Real Programmer |
| Real Programmers Don't Use Pascal | Real Simple Syndication | Real Soon Now |
| real-time | Real-Time Common Design Language | Realtime Disk Operating System |
| Real-Time Euclid | Real-Time Mentat | Real-Time Object-Oriented Modeling |
| Real-Time Operating System | Real-Time Operating System Nucleus | Real-Time Pascal |
| Real Time Streaming Protocol | real-time structured analysis | Real-Time Transport Protocol |
| real user | Real Video | Real World |
| reaper | reassembly | reboot |
| REC | recent changes | recipe |
| recipient | Recital | RECOL |
| Recommended Standard | record | Record Management Services |
| records | Record Separator | rectangle slinger |
| recurrence relation | recurse | recursion |
| recursion theory | recursive | recursive acronym |
| recursive definition | recursive descent parser | Recursive Functional Algorithmic Language |
| Recursive Macro Actuated Generator | recursive type | Red |
| Red Book | Red Brick Intelligent SQL | Redcode |
| redex | Red Hat | RediLisp |
| redirection | redirector | RedNet Ltd. |
| redocumentation | REDUCE | Reduced Instruction Set Computer |
| reduction | reduction strategy | redundancy |
| Redundant Array of Independent Disks | Redundant Array of Independent Drives | Redundant Array of Inexpensive Disks |
| Redundant Array of Inexpensive Servers | Redundant Arrays of Inexpensive Disks | red wire |
| red zone | re-engineering | re-entrant |
| refactoring | REFAL | REF-ARF |
| reference | reference counting | referential integrity |
| referentially transparent | referential transparency | referer |
| referrer | REFINE | Refined C |
| Refined Fortran | reflexive | reflexive domain |
| Reflexive transitive closure | RefLisp | refresh |
| refreshable braille display | refreshable display | refresh rate |
| refuctoring | refutable | regex |
| regexp | Regina | regional network |
| register | register allocation | register assignment |
| register dancing | registered port | register set |
| register spilling | Register Transfer Language | registry |
| regression | regression testing | REG-SYMBOLIC |
| REGTRAL | regular expression | Regular Expression Converter |
| regular graph | rehi | Reid, Brian |
| reify | re-image | reincarnation, cycle of |
| reinvent the wheel | relation | relational algebra |
| relational calculus | relational database | relational database management system |
| relational data model | relational DBMS | relational language |
| relational model | RELATIVE | relatively prime |
| relative pathname | Relative Record Data Set | RELCODE |
| release | released version | REL English |
| relevance | reliability | Reliability, Availability, Serviceability |
| reliable communication | Reliable Data Protocol | religion of CHI |
| religious issues | REM | remailer |
| Remote Access Services | Remote Database Access | Remote Desktop Protocol |
| remote echo | Remote Job Entry | remote login |
| Remote Method Invocation | remote monitoring | Remote Operations Service Element |
| Remote Procedure Call | Remote Reference Layer | Remote Spooling Communication Subsystem |
| Remote Write Protocol | removable disk | removable hard disk |
| rendering | RenderMan Shading Language | rendezvous |
| REP | repeat | repeater |
| repeating group | repeat loop | repeat until |
| repetitive strain disorder | repetitive strain injury | REPL |
| replacement algorithm | Replay | replication |
| replicator | reply | Repondez s'il vous plait |
| Report Program Generator | repository | Representation Language Language |
| Request For Comments | Request For Proposal | Request For Technology |
| Required-COBOL | requirements | Requirements Acquisition and Controlled Evolution |
| requirements analysis | Requirements Engineering | Research Systems, Inc. |
| ResEdit | reserved memory | resolution |
| resolver | Resource Access Control Facility | Resource Description Framework |
| resource fork | Resource Reservation Protocol | Restricted EPL |
| restriction | Restructured EXtended eXecutor | restructuring |
| retcon | rete | RETI |
| Retrieve | retrocomputing | retronym |
| return from interrupt | return from the dead | Return To Zero |
| reusability | reuse | Reverse Address Resolution Protocol |
| Reverse ARP | reverse engineering | Reverse Polish Notation |
| reverse polish syntax | Revised ALGOL 60 | revision |
| Revision Control System | Revolutionary Surrealist Vandal Party | revolutions per minute |
| REX | REXX | REXXWARE |
| RF | RFC | RFC 1014 |
| RFC 1034 | RFC 1035 | RFC 1057 |
| RFC 1058 | RFC 1081 | RFC 1094 |
| RFC 1112 | RFC 1119 | RFC 1123 |
| RFC 1149 | RFC 1156 | RFC 1157 |
| RFC 1171 | RFC 1208 | RFC 1213 |
| RFC 1267 | RFC 1268 | RFC 1304 |
| RFC 1321 | RFC 1334 | RFC 1341 |
| RFC 1347 | RFC 1350 | RFC 1388 |
| RFC 1436 | RFC 1441 | RFC 1442 |
| RFC 1443 | RFC 1444 | RFC 1445 |
| RFC 1446 | RFC 1447 | RFC 1448 |
| RFC 1449 | RFC 1450 | RFC 1451 |
| RFC 1452 | RFC 1475 | RFC 1508 |
| RFC 1509 | RFC 1520 | RFC 1521 |
| RFC 1526 | RFC 1531 | RFC 1550 |
| RFC 1561 | RFC 1568 | RFC 1591 |
| RFC 1630 | RFC 1661 | RFC 1700 |
| RFC 1701 | RFC 1702 | RFC 1707 |
| RFC 1730 | RFC 1756 | RFC 1760 |
| RFC 1777 | RFC 1778 | RFC 1795 |
| RFC 1823 | RFC 1825 | RFC 1831 |
| RFC 1861 | RFC 1938 | RFC 1951 |
| RFC 1959 | RFC 1960 | RFC 2045 |
| RFC 2046 | RFC 2047 | RFC 2048 |
| RFC 2049 | RFC 2060 | RFC 2061 |
| RFC 2068 | RFC 2093 | RFC 2131 |
| RFC 2234 | RFC 2236 | RFC 2246 |
| RFC 2279 | RFC 2281 | RFC 2298 |
| RFC 2326 | RFC 2364 | RFC 2408 |
| RFC 2516 | RFC 2543 | RFC 2549 |
| RFC 2795 | RFC 2821 | RFC 3232 |
| RFC 4213 | RFC 527 | RFC 748 |
| RFC 792 | RFC 793 | RFC 821 |
| RFC 822 | RFC 826 | RFC 854 |
| RFC 903 | RFC 908 | RFC 959 |
| RFCOMM | RFE | RFI |
| RFID | RFP | RFT |
| RG58 | RG8 | RGB |
| Rhapsody | ribbon cable | rib site |
| rice box | Richard Gabriel | Richard Hamming |
| Richard Korf | Richard P. Feynman | Richard P. Gabriel |
| Richard Stallman | rich object | Rich Site Summary |
| Rich Text Format | RIFF | RIGAL |
| Rigel | right brace | right bracket |
| right-click | right join | right outer join |
| right parenthesis | Right Thing | Rijndael |
| ring network | ring topology | Riordan's Internet Privacy Enhanced Mail |
| RIP | rip | ripcording |
| RIPE | RIPEM | ripper |
| RISC | RISCiX | RISC OS |
| RiscPC | RISC System/6000 | Risk Based Testing |
| RISQL | RITL | RJ-11 |
| RJ-45 | RJE | RKM |
| RL | rl | RLaB |
| RLDRAM | RLE | RLF |
| RLL | rlogin | RMAG |
| RMAIL | RMI | RM-ODP |
| RMON | RMS | RNF |
| ro | roach | ROADS |
| Robert T. Morris | ROBEX | RoboHELP |
| robot | robot exclusion standard | robots.txt |
| robust | Rockwell Protocol Interface | Rocky Mountain Basic |
| rococo | ROCOF | roff |
| ROFL | ROFLMAO | rogue |
| rollback | ROM | ROM BIOS |
| ROME | Rom Kernel Manual | room |
| ROOM Methodology | room-temperature IQ | root |
| root bridge | root directory | root mode |
| root node | Root Normal Form | roots |
| root version | ROSE | Rosette |
| Roskind grammars | rot13 | rotary debugger |
| rotational latency | rotations per minute | ROTFL |
| ROTFLMAO | ROTFLMAOASTC | ROTFLOL |
| round-robin | round tape | round-trip time |
| route | routed | route flapping |
| routeing | routeing domain | route leak |
| router | routine | routing |
| Routing Information Protocol | routing policy | Routing Table Maintenance Protocol |
| row | Row Address Strobe | row-level locking |
| Royal Veterinary and Agricultural University | RPC | RPG |
| RPG-II | RPI | RPL |
| RPL-1 | RPM | rpm |
| RPN | Répondez s'il vous plait | RPT |
| RRL | RRS | RS |
| RS-232 | RS-232C | RS-232D |
| RS-422 | RS-423 | RS-449 |
| RS-485 | RS6000 | RS/6000 |
| RS6K | RSA | RSA Data Security, Inc. |
| RSA encryption | RSCS | Réseaux Associés pour la Recherche Européenne |
| Réseaux IP Européens | RS flip-flop | rsh |
| RSI | RSL | RSN |
| RSS | RSS feed | rstat |
| RSTS/E | RSVP | RT-11 |
| RTBM | RTC++ | RT-CDL |
| RTEE | RTF | RTFAQ |
| RTFB | RTFM | RTFM.Humanitarian |
| RTFS | RTI | RTL |
| RTL/1 | RTL/2 | RTM |
| RTMP | RTOS | RTP |
| RT-PC | RTS | RTSA |
| RTSP | RTT | RTTI |
| RTTY | ru | rubi |
| Ruby | rude | RUFL |
| run | RUNCIBLE | run commands |
| runes | runic | run-length encoding |
| Run Length Limited | run time | run-time environment |
| run-time error | run-time library | run-time support |
| run-time system | Run-Time Type Information | ruptime |
| RUSH | Russell | Russell, Bertrand |
| Russell's Attic | Russell's Paradox | rusty iron |
| rusty memory | RUTH | rw |
| rwho | RWP | Rx |
| RYFM | S | s/// |
| S3 | SA | sa |
| SA-110 | SAA | Saber-C |
| Saber-C++ | SAC | SAC-1 |
| SAC2 | sacadm | sacred |
| SAD | SAD SAM | SADT |
| SAFARI | safe | safe mode |
| safety | safety-critical system | saga |
| sagan | SAGE | SAIC |
| SAID | SAIL | SAINT |
| Saint Andrews Static Language | SAL | SALEM |
| Sales Automation | salescritter | Sales Force Automation |
| S-ALGOL | SALT | salt |
| salt mines | salt substrate | SAM |
| sam | SAM76 | Samba |
| SAME | same-day service | SAMeDL |
| samizdat | SAML | Sammet, Jean E. |
| sample | sample rate | sampling |
| sampling frequency | samurai | SAN |
| sandbender | sandbox | Sandman |
| San Francisco | sanity check | Santa Cruz Operation |
| SAP | SAP AG | SAPI |
| SAR | SAS | SASD |
| SASE | SASI | SASL |
| SASL+LV | SASL-YACC | SAS System |
| SATA | SATAN | Sather |
| Sather-K | satisfiability problem | saturation |
| Saturday-night special | sausage code | SAVE |
| save | save as | say |
| sb | SB AWE32 | SBCS |
| SBD | SBE | SBM |
| SB-Prolog | SBR | SBus |
| SC | sc | SCA |
| SCADA | scag | scalability |
| Scalable Coherent Interface | Scalable Processor ARChitecture | Scalable Sampling Rate |
| Scalable Vector Graphics | scalar | SCALLOP |
| SCAN | scan | scan design |
| SCANDISK | Scan-EDF | scanf |
| Scan-In, Scan-Out | scan line | scanner |
| scanno | scan path | scan register |
| scar tissue code | SCC | SCCS |
| SCEPTRE | Schachter's Hypothesis | scheduler |
| scheduling | Scheduling API | Scheduling Application Programming Interface |
| Schelog | schema | Schema Definition Set |
| Schema Representation language | schematic capture | schematic type variable |
| Schematik | Scheme | Scheme84 |
| Scheme88 | Scheme->C | Scheme Library |
| Scheme-Linda | Scheme Object System | Scheme Repository |
| Scheme-to-C | Schlaer-Mellor | Schoonschip |
| schrödinbug | SCI | Science and Engineering Research Council |
| Scientific Data Systems | Sci-Hub | SCL |
| SCM | SC/MP | SCO |
| Scode | SCOOP | SCOOPS |
| SCOPE | scope | Scorpion |
| Scott-closed | Scott domain | SCPI |
| SCPI Consortium | scram switch | SCRAP |
| scratch | scratch disk | scratch monkey |
| Scratchpad I | Scratchpad II | scream and die |
| Screamer | screaming tty | screen |
| screen blanker | screen dump | Screen Peace |
| screen popping | screen reader | screen refresh |
| screen saver | screen scraper | screen server |
| screen sharing | Screenwrite | screw |
| screwage | scribble | Scribe |
| SCRIPT | script | Scriptics |
| scripting language | scrog | SCROLL |
| scroll | scrollable list | scroll bar |
| scrolling | scrool | scrozzle |
| scruffies | SCSI | SCSI-1 |
| SCSI-2 | SCSI-3 | SCSI adapter |
| SCSI adaptor | SCSI controller | SCSI ID |
| SCSI initiator | SCSI interface | SCSI reconnect |
| SCSI target | ScumOS | scuzzy |
| SD | sd | sdcv |
| SDDI | SDE | SDF |
| SDH | SDI | SDK |
| SDL | SDL 92 | SDLC |
| SDM | SDMS | SDP |
| SDRAM | SDRC | SDR-RAM |
| SDR-SDRAM | SDS | SDS 92 |
| SDS 940 | SDSL | SE |
| se | SEA | Seagate Technology |
| SEAL | search | search algorithm |
| search-and-destroy mode | search engine | search problem |
| search term | Search The Fucking Web | SEC |
| SECC | SECD machine | secondary cache |
| secondary damage | secondary key | secondary storage |
| second generation | second generation computer | second generation language |
| second level cache | second normal form | Second-Order Lambda-calculus |
| second-system effect | sector interleave | sector interleaving |
| sector map | sector mapping | Secure File Transfer Protocol |
| Secure Hash Algorithm | Secure Multipurpose Internet Mail Extensions | Secure Shell |
| Secure Sockets Layer | security | Security Administrator's Integrated Network Tool |
| Security Association | Security Association ID | security through obscurity |
| security vulnerability | SED | Sed |
| SEE | seed | seek |
| seeking | seek time | SEESAW |
| see u see me | SEGA | Sega Genesis/MegaDrive |
| segfault | seggie | segment |
| segmentation | segmentation and reassembly | segmentation fault |
| segmented address space | segv | SEI |
| Seiko RC-4000 | SEL | Selective Dissemination of Information |
| selector | Self | Self-Extensible Language |
| Self Extracting Archive | self-reference | selvage |
| SEM | semantic gap | semantic network |
| semantics | semaphore | semi |
| Semi-Automatic Ground Environment | semicolon | semiconductor |
| Semidetached Mode | SENDIT | sendmail |
| sendmail.cf | Sendmail Inc. | Seneca |
| senior bit | sense | sensor |
| sentence | SE-ODP | SEP |
| separate compilation | SEPIA | SEPP |
| Seque | Sequel | sequence |
| Sequenced Packet Exchange | sequencer | Sequent |
| sequential coding | sequential file matching | Sequential Parlog Machine |
| sequential processing | SERC | SERCOS |
| serial | Serial Advanced Technology Attachment | Serial ATA |
| serial communications | Serial Communications Interface | Serial Interface adapter |
| serial IO chip | serialise | serialize |
| serial line | Serial Line Internet Protocol | Serial Line IP |
| Serial Peripheral Interface | serial port | Serial Presence Detect |
| serial processing | serial processor | Serial Storage Architecture |
| serve | servelet | server |
| serverlet | Server Message Block | server-parsed HTML |
| server room | servers | server-side |
| server-side include | service | serviceability |
| Service Access Point | Service Advertising Protocol | Service Discovery Protocol |
| service-oriented architecture | service provider | Service Set Identifier |
| servlet | session | Session Initiation Protocol |
| session layer | SES/workbench | SET |
| set | set abstraction | set associative cache |
| set complement | set comprehension | Set Equation Transformation System |
| Setext | SETL | SETL2 |
| SETL/E | Set Priority Level | SETS |
| set theory | set-top box | SEUS |
| seven layer model | Seven-Segment Display | SEX |
| sexadecimal | sex changer | SEXI |
| Seymour Cray | SFA | SFBI |
| SFD-ALGOL | SFFA | SFL |
| SFLV | sFTP | sg |
| SGCP | SGI | SGML |
| sgmls | SGML Tagger | SGRAM |
| sh | SHA | SHACO |
| SHADOW | shadowing | shadow ram |
| shallow binding | shambolic link | Shape_VC |
| ShapeTools | shar | sharchive |
| sharding | Share and enjoy! | shared memory |
| shared memory system | Shared Time Repair of Big Electronic Systems | shareware |
| shar file | sharp | Sharp APL |
| S-HDSL | shebang | SHEEP |
| shelf | shelfware | SHELL |
| shell | shell out | shell script |
| shell variable | shielded twisted pair | SHIFT |
| Shift In | shift left logical | Shift Out |
| shift right logical | shim | shitogram |
| Shockwave | shockwave | Shockwave Flash |
| shopbot | short card | Short Code |
| shortcut | Shorten | shortest job first |
| Short Message Service | shotgun debugging | shoulder surfing |
| shovelware | Show-And-Tell | showstopper |
| shriek | shrug report | sht |
| SHTF | shtml | Shub-Internet |
| SHUG | Shugart, Alan F. | Shugart Associates |
| Shugart Technology | SI | si |
| SIA | SIBO | SICL |
| SICS | SICStus Prolog | sidecar |
| side-effect | Siemens | Siemens Nixdorf Informationssteme, AG |
| Sierra | SIFT | SIG |
| Sig | sig | sig block |
| SIGBUS | SIGhyper | SIGLA |
| SIGMA | SIGNAL | signal |
| signalling rate | Signalling System 7 | signal-to-noise ratio |
| signature | sig quote | sig virus |
| SIL | Silage | silicon |
| silicon chip | Silicon Graphics, Inc. | Siliwood |
| silly walk | silo | Silver Book |
| silver bullet | SIM | SIMAN |
| SimCity | SimCity 2000 | SIMD |
| Similix | SIML/I | SIMM |
| Simone | Simonyi, Charles | SIMPAC |
| SIMPAS | SIMPL | SIMPLE |
| Simple Actor Language | Simple Authentication and Security Layer | Simple Gateway Control Protocol |
| Simple Mail Transfer Protocol | simple multicast protocol | Simple Network Management Protocol |
| Simple Network Management Protocol version 2 | Simple Network Paging Protocol | Simple Object Access Protocol |
| simplex | simplex method | simplex printer |
| SIMPL/I | Simplified Multicast Routing Protocol | SIMPL-T |
| SIMSCRIPT | SIMSCRIPT I.5 | SIMSCRIPT II.5 |
| simship | SIMULA | SIMULA 67 |
| SIMULA I | simulate | simulated annealing |
| Simulating Digital Systems | simulation | SIMulation ANalysis |
| Simulation Language for Alternative Modeling | Simulation Oriented Language | Simultaneous Engineering Environment |
| Simultaneous Peripheral Operation On-Line | simultaneous shipment | Simware, Inc. |
| SINA | since time T equals minus infinity | Sinclair, Clive |
| Sinclair PC200 | Sinclair Radionics | Sinclair Research |
| sine wave | single assignment | single assignment language |
| single-attached | Single Connection Attach | Single Connector Attachment |
| Single Data Rate Random Access Memory | Single Data Rate Synchronous Dynamic Random Access Memory | Single Document Interface |
| single-duplex | Single Edge Contact | Single Edge Contact Cartridge |
| Single Edge Processor Package | single-electron transistor | Single Electron Tunneling |
| Single Electron Tunneling Technology | single ended | Single Image Random Dot Stereogram |
| single inheritance | Single In-line Memory Module | Single Inline Pin Package |
| Single Instruction Multiple Data | Single Instruction/Multiple Data | Single-line Digital Subscriber Line |
| single-page web application | Single-pair High Speed Digital Subscriber Line | single program/multiple data |
| single quote | single sign-on | single sourcing |
| single static assignment | singleton variable | Single Virtual Storage |
| siod | SIP | SIPB |
| SIPLAN | SIPP | SI prefix |
| Siprol | SIR | SIRDS |
| Siri | SIRTS | SISAL |
| sit | SITBOL | site map |
| sitename | SIxteen Bit Organisers | sj |
| sk | Skel-ML | Sketchpad |
| S/Key | Skill | Skim |
| SkipJack | SKOL | skolemisation |
| S-K reduction machine | skrog | SKsh |
| SKU | skulker | SL |
| sl | SL5 | slack |
| slackware | SLAM | SLANG |
| S-Lang | slap on the side | slash |
| slashdot effect | slave tty | SLD resolution |
| sleep | SLIB | Slide |
| sliding-window | SLIM | slim |
| Slingshot | SLIP | SlipKnot |
| SLIPS | SLiRP | SLLIC |
| slog | Sloop | slop |
| slopsucker | slosh | Slot 1 |
| Slot 2 | Slot A | slurp |
| sm | smail | SMALGOL |
| SMALL | Small Business Edition | Small-C |
| Small Computer System Interface | small-office/home-office | Small Outline DIMM |
| Smalltalk | Smalltalk-80 | Smalltalk/V |
| SmallVDM | SMALLWORLD | SmallWorld |
| Smarandache logic | SMART | smart |
| Smart Battery Data | smart card | Smartdrive |
| SMARTdrv | smart terminal | smash case |
| smash sum | smash the stack | SMB |
| smbclient | smblib | SMBus |
| SMCC | SMDS | SMG |
| SMI | SMIL | smiley |
| smilies | S-MIME | SML |
| SML# | sml2c | SML/NJ |
| SMM | SMNP | smoke |
| smoke and mirrors | smoke-emitting diode | smoke test |
| smoking clover | SMoLCS | SMOP |
| SMP | SMPS | SMPT |
| SMRP | SMS | SMT |
| SMTP | smug report | smurf |
| sn | SNA | snacc |
| snaf | SNAFU principle | snag |
| snail mail | SNAP | snap |
| snap dump | Snappy | Snappy Video Snapshot |
| snarf | snarf & barf | snarf down |
| snark | sneakernet | sneck |
| snert | SNI | Sniff |
| sniff | sniffer | snivitz |
| SNMP | SNMP agent | SNMPv2 |
| SNOBOL | SNOBOL2 | SNOBOL3 |
| SNOBOL4 | SNOOPS | SNPP |
| SNR | S/N ratio | SNR bandwidth product |
| SO | so | SO 2 |
| SOA | SOAP | SOAR |
| social engineering | social network | social networking |
| social science number | socket | Socket 1 |
| Socket 2 | Socket 3 | Socket 370 |
| Socket 4 | Socket 5 | Socket 6 |
| Socket 7 | Socket 8 | SOCKS |
| SOCRATIC | SODA | SODAS |
| SO-DIMM | Sod's Law | SOE |
| SoftBench | soft boot | softcopy |
| Softlab | soft link | SoftModem |
| SoftVelocity Inc. | software | Software AG |
| software audit | Software BackPlane | software bloat |
| Software bus | software copyright | Software Description Database |
| Software Developers Kit | software development life cycle | software enabling |
| software engineering | Software Engineering Environment | software handshaking |
| software interrupt | Software in the Public Interest, Inc. | software laser |
| software law | software life-cycle | Software Method |
| Software Methodology | software metric | software patent |
| software piracy | software pirate | Software Practice and Experience |
| Software Productivity Centre | Software Publishing Certificate | Software Publishing Corporation |
| software reliability | software rot | software theft |
| Software through Pictures | software tool | Software Verification Research Centre |
| Software Writer's Language | softwarily | softy |
| SOH | SOHIO | SoHo |
| SOIF | SOJ | SOL |
| Solaris | SOLID | solid state |
| Solid State Disk | solid-state storage device | SOLO |
| solution | Solution Based Modelling | Solve |
| SOM | Somar DumpAcl | Somar Software |
| some random X | Sonata | SONET |
| Sony Playstation | SORCERER | sorcerer's apprentice mode |
| sort | sorting | SOS |
| sound | Sound Blaster | sound card |
| soundex | soundness | source |
| source code | source code control | source code escrow |
| source code management | source language | source-level debugger |
| source of all good bits | source package | source route |
| source routing | southbridge | SP |
| SP2 | SP/2 | space |
| space bar | space-cadet keyboard | space complexity |
| space key | space leak | SPACEWAR |
| SPADE | spaghetti code | spaghetti inheritance |
| spaghetti with meatballs code | spam | spamdex |
| spamming | spanning tree algorithm | SPAR |
| SPARC | SPARC International, Inc. | SPARCStation |
| SPARCstation 10 | SPARCstation 20 | SPARCsystem 4 |
| SPARC Xterminal 1 | SPARK | SPARK Annotation Language |
| SPARKS | sparse | Spatial Technologies |
| spawn | SPC | SPD |
| SPDL | SPE | Speakeasy |
| speaker | SPEC | Spec |
| spec | SPECbase_fp92 | SPECbase_int92 |
| SPECbaserate | SPEC CFP92 | SPEC CINT92 |
| SPECfp92 | SPECIAL | special-case |
| Special Interest Group | specialisation | specification |
| specific markup | SPECint92 | SPECmark |
| SPECmark89 | SPECOL | SPEC rate |
| SPECrate_base_fp92 | SPECrate_fp92 | SPECrate_int92 |
| SPEC ratio | Spectral Band Replication | Spectrum |
| speculative evaluation | speculative execution | Speech Application Programming Interface |
| speech recognition | Speech Recognition Application Program Interface | speech synthesis |
| SPEED | Speedcoding | Speedcoding 3 |
| SPEEDEX | speedometer | spell |
| spelling flame | Sperry Corporation | Sperry Univac |
| SPG | SPGA | SPI |
| Spice Lisp | SPID | spider |
| Spiderweb | spiffy | spike |
| spill | spim | spin |
| spin control | spinner | spiral model |
| SPIT | SPITBOL | spiware |
| SP/k | SPL | SPL/1 |
| SPLash! | splash screen | splat |
| SPL/I | SPLINTER | split |
| Split-C | splot | SPLX |
| SPM | SPMD | SPML |
| spod | spoiler | sponge |
| spoo | spoof | spoofing |
| spooge | SPOOL | Spool |
| spool | spooler | spool file |
| SpoolView | spray | spreadsheet |
| spread spectrum communications | SPRING | SPRINT |
| Sprintnet | Sprite | sprite |
| sprocket feed | SPS | SPSS |
| SPSS, Inc. | SPUR | SPX |
| spx | spyware | SQE |
| SQL | SQL2 | SQL3 |
| SQL Access Group | SQL/DS | SQL Module Language |
| SQL Server | SQL server | SQLWindows |
| SQR | SQRIBE | Square |
| square-headed boyfriend | square-headed girlfriend | square tape |
| Squeak | Squiggol | squirt the bird |
| SR | sr | SRAM |
| SRAPI | S. R. Bourne | SRC Modula-3 |
| SRDL | SR flip-flop | SRI |
| SRI International | SRL | SRP |
| SS7 | SSA | SSADM |
| SSBA | SSD | SSE |
| SSE-2 | ssh | SSH File Transfer Protocol |
| SSI | SSID | SSII |
| SSL | S/SL | SSLeay |
| SSMA | SSO | SSR |
| st | ST-506 | STAB |
| STAB-11 | stable | stable sort |
| STAC | stac compression | stack |
| Stack Environment Control Dump machine | stack frame | stacking order |
| stack loader | stack overflow | stack pointer |
| stack puke | stack traceback | STAGE2 |
| Staggered Pin Grid Array | staircase | staircasing |
| stale pointer bug | Stalker | stalker_portal |
| stalker_portal/c/version.js | Stallman, Richard M. | stand-alone |
| standard | Standard Commands for Programmable Instruments | Standard d'Echange et de Transfert |
| standard deviation | standard for robot exclusion | Standard for the exchange of product model data |
| Standard Generalised Markup Language | Standard Generalized Markup Language | standard input/output |
| Standard Instrument Control Library | standard interpretation | standard I/O |
| Standard Lisp | Standard ML | Standard ML of New Jersey |
| Standard Operating Environment | standard semantics | Standard Widget Toolkit |
| St Andrews Static Language | Stanford Artificial Intelligence Laboratory | Stanford Artificial Intelligence Language |
| Stanford Research Institute | Stanford University | STAPLE |
| Staple | STAR 0 | StarBurst |
| StarDict | StarDict console version | StarLISP |
| StarMOD | star network | Starset |
| STARSYS | start bit | start of authority |
| Start Of Header | Start Of Text | start tag |
| stat | state | state diagram |
| stateless | state machine | statement |
| state transition diagram | State University of New York | static |
| statically typed | static analysis | static database management system |
| static DBMS | static link | static method |
| static nested scope | static nested scoping | static RAM |
| static random-access memory | static scope | static typing |
| static variable | Station Management | Statistical Analysis System |
| Statistical Package for the Social Sciences | statistical time division multiplexing | statistics |
| StatMUX | status | STB |
| STD | STD 1 | STD 13 |
| STD 15 | STD 2 | STD 9 |
| stderr | stdin | stdio |
| stdio.h | STDM | stdout |
| STDWIN | steam-powered | Steelman |
| steganography | stemmer | stemming |
| STENSOR | STEP | Stephen Cole Kleene |
| Stephen Jobs | Stephen Kleene | stepper motor |
| Stepstone Corp | stepwise refinement | stereogram |
| Sterling Software, Inc. | Steve Jobs | Steve Russell |
| Steve's Shell | Steve Wozniak | STFT |
| STFU | STFW | Sticks&Stones |
| sticky analysis | sticky bit | sticky content |
| stiffy | STIL | STING |
| STk | STMP | stochastic |
| stock-keeping unit | STOIC | stomp on |
| STONE | Stone Age | stone knives and bearskins |
| Stoneman | stop bit | stoppage |
| storage | Storage Allocation and Coding Program | Storage Area Network |
| Storage Management Services | storage media | store |
| store and forward | stored procedure | storm |
| Story of Mel | STP | StP |
| STP4 | Strachey, Christopher | Strand |
| Strand88 | Stratus | Strawman |
| STREAM | stream | streaming |
| Streaming SIMD Extensions | stream-oriented | STREAMS |
| strength reduction | STRESS | stress testing |
| strict | strict evaluation | strided |
| string | String EXpression Interpreter | stringification |
| stringify | stringly typed | STring Oriented Interactive Compiler |
| String Oriented Symbolic Language | String PRocessING language | string reduction |
| stripe | stripe set | striping |
| STROBES | stroke | StrongARM |
| strongly connected component | strongly typed | strong typing |
| Stroustrup, Bjarne | struct | structural recursion |
| structured analysis | Structured Analysis and Design Technique | structured design |
| structure diagram | structured language | structured programming |
| Structured Query Language | Structure of Management Information | strudel |
| STRUDL | STSC APL | stty |
| stub | stub network | stubroutine |
| STUDENT | Student PL/I | studly |
| studlycaps | Stuffit | Stupids |
| stupid-sort | Sturgeon's Law | STX |
| style | su | SUB |
| subband encoding | subclass | subject |
| subject index | subject-oriented programming | sublanguage |
| subnet | subnet address | subnet mask |
| subnet number | subroutine | subscribe |
| Subscriber Identity Module | subscribing | Subset-Equational Language |
| Substitute | substrate | subtype |
| subtyping | SuccessoR | successor |
| sucking mud | Sue | sufficiently small |
| SUGAR | suicideware | SUIF |
| suit | suitably small | Suite Synthetique des Benchmarks de l'AFUU |
| sum | Summary Object Interchange Format | SUMMER |
| SUMMER SESSION | sum of products | sum of products type |
| Sun | Sun-2 Workstation | Sun-3 Workstation |
| Sun-4 Workstation | sun lounge | Sun Microsystems, Inc. |
| SunOS | sunspots | sun-stools |
| SunView | SUNY | SUPER |
| Super 7 | Superbrain | SuperBrain II |
| superclass | supercombinators | supercompilation |
| supercomputer | SuperDrive | superhighway |
| SuperJanet | SUPERMAC | super minicomputer |
| SuperPaint | Super Pascal | superpipelined |
| superprogrammer | superscalar | super source quench |
| SuperTalk | superuser | Super VGA |
| Super Video Graphics Adapter | Super Video Graphics Adaptor | Super Video Graphics Array |
| supervisor mode | Supervisory Control and Data Acquisition | SuperZap |
| Supplementary Ideographic Plane | support | supremum |
| Sure | surfing | SURGE |
| surjection | surjective | surrogate key |
| suspension | Suzie COBOL | sv |
| SVC | SVG | SVGA |
| SVGA monitor | SVID | S-Video |
| SVR4 | SVRC | SVS |
| swab | SWAG | swap |
| swap file | swapped in | swapped out |
| swapping | swap space | Sweden |
| SweetLambda | swf | Swing |
| SWI-Prolog | Swiss Army Code | switch |
| Switched Multimegabit Data Service | switched virtual circuit | switched virtual connection |
| switching | switching hub | switch statement |
| swizzle | SWL | SWT |
| swung dash | sy | Sybase, Inc. |
| Sybase SQL Server | SYDEL | SYGMA |
| SYLK | syllogism | Sylvan |
| Symantec | SYMBAL | SymbMath |
| SYMBOLANG | Symbolic Assembler Program | SYMBOLIC ASSEMBLY |
| Symbolic Automatic INTegrator | symbolic inference | Symbolic Link |
| symbolic link | symbolic logic | Symbolic Mathematical Laboratory |
| symbolic mathematics | Symbolic Optimal Assembly Program | Symbolic Optimum DEUCE Assembly Program |
| Symbolics, Inc. | Symbol Manipulation Program | symlink |
| symmetric | symmetric key cryptography | Symmetric LISP |
| symmetric multiprocessing | symmetric multiprocessor | Symphony |
| SYMPL | SYN | sync |
| Synchronized Multimedia Integration Language | synchronous | Synchronous Data Link Control |
| Synchronous Digital Hierarchy | Synchronous DRAM | Synchronous Dynamic Random Access Memory |
| Synchronous Graphics RAM | Synchronous Graphics Random Access Memory | Synchronous idle |
| synchronous key encryption | Synchronous Optical NETwork | syncronous |
| synflood | synonym ring | syntactic salt |
| syntactic sugar | syntax | Syntax-Case |
| syntax directed translation | Syntax/Semantic Language | syntax tree |
| synthesis | Synthesizer Specification Language | sypware |
| SyQuest Technology, Inc. | sysadmin | sysape |
| Sysdeco Mimer AB | sys-frog | SYSKEY |
| SYSLISP | sysop | Sysplex |
| sysprog | system | System/360 |
| System/370 | System 5 | System 7.5 |
| System Account Manager | system administration | system administrator |
| system analysis | system analyst | system board |
| system call | system catalog | System Control Language |
| Systeme International | System F | System International |
| system management | System Management Bus | System Management Mode |
| System Management Server | system manager | system mangler |
| system operator | System Product Interpreter | system programming language |
| System R | Systems Administrators Guild | systems analysis |
| Systems Analysis Definition | systems analyst | Systems Application Architecture |
| Systems Development Life Cycle | systems jock | Systems Network Architecture |
| system software | systems operator | systems programmer |
| systems programming | system testing | system unit |
| System V | System V Interface Definition | Système International |
| Système International d'Unités | systolic array | SysVile |
| sz | T | T1 |
| T1 line | T1 rate | T3 |
| T3 line | TA | TAA |
| TAB | table | table locking |
| tablespace | TABLET | TABLOG |
| tab-separated values | TABSOL | Tabulating Machine Company |
| TAC | TACL | TACPOL |
| Tactile User Interface | tag | Tagged Image File Format |
| tagged queueing | tagged types | tag name |
| tail call optimisation | tail call optimization | tail circuit |
| tail recursion | tail recursion modulo cons | tail recursion optimisation |
| tail-strict | TAL | TALE |
| Taligent | talk | talk bomb |
| talker system | talk mode | TALL |
| tall card | Tandem Application Language | Tandem Computers |
| Tandy | Tanenbaum, Andrew | Tangible User Interface |
| tanked | TANSTAAFL | TAO |
| TAOS | TAP | tap |
| tape | tape archive | tape drive |
| tape head | Tape Operating System | TAPI |
| tar | tar and feather | tarball |
| targa | Targa Graphics Adapter | target |
| Target-Machine Description Language | TARTAN | taskbar |
| Task Control Block | task scheduling | TASM |
| TASS | taste | tatar |
| tau | tautological probability | tautological set |
| tautology | TAWK | Taxis |
| tayste | taz | TB |
| TBF | TBIL | TBK |
| Tbl | tc | T-carrier system |
| TCB | TCGS | TC/IX |
| Tcl | Tcl Consortium | tcl-debug |
| Tcl-DP | tclhttpd | TclX |
| TCM | TCO | Tcode |
| TCOL | TCOL.Ada | TCP |
| TCPIP | TCP/IP | tcsh |
| Tcsim | TCVN 5773 | TCVN 6056 |
| td | TDD | TDEL |
| TDF | TDFL | TDI |
| TDM | TDMA | TDR |
| Teamwork | Technical/Office Protocol | Technion |
| technology | Technology Enabled Relationship Manager | Technology of Object-Oriented Languages and Systems |
| TechRef | TECO | tee |
| TEI | telco | TELCOMP |
| Telecommunication Display Device | Telecommunications Device for the Deaf | Telecommunications Industry Association |
| telecommuting | teledildonics | telegraphy |
| telematics | TelEnet | TELEPAC |
| Telephone Application Program Interface | telephony | Telephony Application Programming Interface |
| Telephony User Interface | Telerat | Telescope User Interface |
| Telescript | Teletype | teletype |
| Teletype Corporation | teletypewriter | TeleUSE |
| television | Television Interface Adapter | TELNET |
| Telocator Alphanumeric Protocol | Telon | TELOS |
| TELSIM | template | template code |
| template wizard | TEMPLOG | TEMPO |
| Tempo | temporal database | temporal logic |
| Tempura | Ten15 | tendinitis |
| TenDRA | ten-finger interface | tennis elbow |
| tense | tensor product | tenured graduate student |
| tera- | terabyte | teraflop |
| teraflop club | TERM | TERMAC |
| termcap | terminak | terminal |
| Terminal Access Controller | Terminal Adapter | Terminal Adaptor |
| terminal brain death | terminal emulation | terminal emulator |
| terminal illness | terminal junkie | terminal node |
| Terminal Oriented Real Time Operating System | Terminal Oriented Social Science | Terminal Productivity eXecutive |
| terminal server | Terminal User Interface | Terminate and Stay Resident |
| termination analysis | terminator | term rewriting system |
| Terms Of Service | ternary | terpri |
| terrabyte | Terse | test |
| test coverage | test-driven development | testing |
| TET | TeX | TeX-78 |
| TeX-82 | Texas Instruments | Texinfo |
| TeX point | text | text-based |
| text editor | Text Encoding Initiative | text file |
| Text Processing Utility | Text Reckoning And Compiling | text segment |
| Text To Speech | Textual User Interface | texture |
| tf | TFDL | TFT |
| TFTP | tg | TGA |
| T-gen | TGS-II | TGS Systems |
| tgz | th | thanks in advance |
| That's not a bug, that's a feature! | T.H.E | The Cuckoo's Egg |
| The Dojo Toolkit | The Force | The Internet Account |
| The MathWorks, Inc. | The Metadata Company | The Microsoft Network |
| The Mythical Man-Month | The Network | THEO |
| theology | The Open Group | theory |
| theory change | The Real-Time Operating System Nucleus | There's More Than One Way To Do It |
| Theseus | The story of Mel | The story of Mel, a Real Programmer |
| The World Of Cryton | the X that can be Y is not the true X | thicket |
| thick Ethernet cable | thick film dielectric electroluminescence | thicknet |
| thin client | thin Ethernet cable | ThingLab |
| Think C | Thinking Machines Corporation | thinko |
| thinnet | third generation computer | third generation language |
| third normal form | This can't happen | this dictionary |
| This time, for sure! | thn | Thomas |
| thrash | thrashing | thread |
| threaded | threaded code | threading |
| Thread Language Zero | thread-safe | three-finger salute |
| three-letter acronym | three-tier | throughput |
| thud | Thumb | thumb |
| thumbnail | Thunderbird | thunk |
| TIA | tick | TickIT |
| Tickle | tickle a bug | tick-list features |
| TIFF | tiger team | tight loop |
| tilde | TILE Forth | Tim Berners-Lee |
| time bomb | time complexity | Time Complex Simulator |
| time division multiple access | time division multiplexing | Time Domain Reflectometer |
| timeout | time quantum | time-sharing |
| Time Sharing Option | time shifting | Time Simulator |
| time sink | time slice | times-or-divided-by |
| time T | Time to Live | time zone |
| Tim Peters | Timsort | TINC |
| Tinman | tinman+ | TINT |
| tint | Tiny | Tiny BASIC |
| Tiny Basic Interpreter Language | Tiny Clos | Tiobe |
| TIP | TIPL | tip of the ice-cube |
| tired iron | tits on a keyboard | tj |
| Tk | tk | TK-90X |
| TK-95 | T. Kohonen | TK!Solver |
| TL0 | TL1 | TLA |
| TLAs | TLB | TLD |
| TLI | TL/I | T Lisp |
| TLS | TLTR | TM |
| tm | TMDL | TMG |
| TMRC | TMRCie | TMS 9900 |
| tn | tn3270 | TNC |
| TNSTAAFL | TNX | TNXE6 |
| to | to a first approximation | toast |
| toaster | toasternet | to a zeroth approximation |
| toggle | TOK | token |
| token bus | token ring | Tomcat |
| TomeRaider | Tom Knight | tone |
| Tony Hoare | tool | toolbar |
| toolbook | Toolbuilder | Tool Builder Kit |
| Tool Command Language | TOOLS | toolsmith |
| TOP | top-down design | Top-Down Model |
| topic drift | topic group | topic map |
| topic thread | top-level domain | topology |
| TOPS-10 | TOPS-20 | Tornado |
| Toronto Euclid | torrent | TORTOS |
| TOS | Toshiba Corporation | TOSS |
| total function | totally ordered | totally ordered set |
| total ordering | toto | touchpad |
| touch screen | tourist | tourist information |
| Towers of Hanoi | Tower Technology Corporation | toy |
| Toy/Ada | toy language | Toyohashi University Parallel Lisp Environment |
| toy problem | toy program | tp |
| TPA | TPF | TP/IX |
| TPL | TPO | TPS |
| tptc | TPU | TPX |
| tr | TRAC | traceroute |
| trace scheduling | track | track ball |
| tracker ball | tracking | tracking cookie |
| tracking file | trackpad | TrackPoint |
| tractor feed | TrafoLa | Trafola-H |
| trampoline | TRANDIR | TRANQUIL |
| TRANS | transaction | Transaction Application Language |
| Transaction Processing Facility | transceiver | TRANSCODE |
| transducer | transfer | transfer full |
| transfer none | transfer of control | transfer rate |
| transfer syntax | transfinite induction | transformation |
| transient | Transient Program Area | transistor |
| Transistor-Transistor Logic | TRANSIT | transition ad |
| transitive | transitive closure | transit network |
| Translation Look-aside Buffer | Transmission Control Protocol | transparent |
| transparent audio coding | Transport Driver Interface | transport layer |
| Transport Layer Interface | Transport Layer Security protocol | Transport Level Interface |
| Transport Service Access Point | transputer | TRANS-USE |
| trap | trap door | trap-door function |
| trash | Trash-80 | traveling salesman problem |
| travelling salesman | travelling salesman problem | traversal |
| traverse | traversing | trawl |
| tree | tree-killer | tree shaking |
| TREET | TREETRAN | Tree Transformation Language |
| treeware | Trellis | Trellis Code Modulation |
| Trident | trigger | trigger finger |
| TRIGMAN | trillion | Trilogy |
| triple DES | tri state | trit |
| Triton | Triton II | Triton VX |
| Trivial File Transfer Protocol | TRO | troff |
| troglodyte | troglodyte mode | trojan |
| Trojan horse | Trojan:Win32/Ymacco.AAB8 | TROLL |
| troll | TRON | tron |
| Trouble Came Back | TRS | TRS-80 |
| Truchet point | True BASIC | true colour |
| true hacker | TRUENAME | TrueType |
| Trumpet | TRUSIX | truth table |
| TS | TSAP | TSEE |
| TSIA | Tsim | TSL-1 |
| TSO | TSP | TSR |
| TSV | tt | TTD |
| TTFN | TTL | TTS |
| tty | TTYL | TUB |
| TUBA | tube | tube time |
| Tuckals | TUI | Tukey, John |
| Tuki | tunafish | tune |
| tunneling | tunnelling | Tunny Emulator |
| TUPLE | tuple | tuple calculus |
| Tuple Space Smalltalk | tupling | Turbo C |
| Turbo C++ | Turbo Debugger | turbo nerd |
| Turbo Pascal | Turbo Prolog | Turing |
| Turing Machine | Turingol | Turing Plus |
| Turing tar-pit | Turing test | turist |
| TURN | turn-key | turtle graphics |
| TUTOR | Tuxedo | TV |
| tv | tw | TWAIN |
| tweak | tweening | tweeter |
| TWENEX | Twente Compiler Generator System | Twentel |
| twiddle | TWIG | twilight zone |
| twink | twinning | Twin Vector Quantization |
| twip | twirling baton | twisted pair |
| twisted pair only | Twitter | twm |
| two-binary, one-quaternary | twonkie | two-phase commit |
| twos complement | two-to-the-N | two-valued logic |
| TX-0 | TXL | TYMCOM-X |
| TYMNET | Tymshare, Inc. | type |
| type-ahead | type-ahead search | type assignment |
| type class | typed lambda-calculus | TypedProlog |
| typeface | type inference | type scheme |
| typo | typographical error | typography |
| TYPOL | typo squatter | tyt |
| TZ | tz | ua |
| UAN | UART | UAT |
| UAW | UBASIC | UBD |
| ubiquitous computing | uC++ | UCB |
| UCHO | U-Code | UCP |
| UCS | UCSD Pascal | UCS transformation format |
| UCX | udb | UDDI |
| UDF | UDMA | UDP |
| uemacs | UFO | UFO bug |
| ug | UGLIAC | UHELP |
| UI | uid | UIDL |
| UIL | UIMS | UIMX |
| UIS | uk | UKC |
| UKERNA | UKUUG Ltd. | ULCC |
| Ulm's Modula-2 System | ULP | Ultra64 |
| Ultra-ATA | Ultra DMA | Ultra-SCSI |
| Ultrix | um | UMB |
| UMB Scheme | UMDL | UML |
| uML | UMTS | unary |
| unary operator | UNC | UNCL |
| UNCOL | uncompression | uncountable |
| uncurry | uncurrying | undefined |
| undefined external reference | underflow | Undernet |
| underscore | under the hood | undocumented feature |
| U-NET Limited | unfold | unfold/fold |
| UNI | unicast | Unicode |
| UniCOMAL | Unicorny | unicos |
| Uniface | unification | Unified Han |
| Unified Modeling Language | unifier | UNIFORM |
| Uniform Naming Convention | Uniform Resource Citation | Uniform Resource Locater |
| Uniform Resource Locator | Uniform Resource Name | Uniform Resource Number |
| Unify | unify | Unify Corporation |
| Unihan | uninstaller | uninteresting |
| Uninterruptible Power Supply | union | Unipalm Group plc |
| Unipress Software, Inc. | uniprocessor | UNIQUE |
| Unique ID Listing | unique key | unique sales point |
| Unir Tech | UNISAP | Unisys Corporation |
| United Kingdom Education and Research Networking Association | United Kingdom Unix Users Group | United Technologies Research Cente |
| Unit Separator | unit testing | UNITY |
| Univac | Universal algebra | Universal Asynchronous Receiver/Transmitter |
| Universal Character Set | Universal Communications X | Universal Computer Protocol |
| Universal Debugger | Universal Description, Discovery, and Integration | Universal Disk Format |
| Universal Naming Convention | universal quantifier | Universal Resource Identifier |
| Universal Resource Locator | Universal Serial Bus | universal thunk |
| Universal Time | Universal Time Coordinated | universe of discourse |
| University of Arizona | University of California at Berkeley | University of Durham |
| University of East London | University of Edinburgh | University of Hawaii |
| University of Iceland | University of London Computing Centre | University of Michigan |
| University of Michigan Digital Library Project | University of Minnesota | University of Nijmegen |
| University of Pennsylvania | University of Tasmania | University of Twente |
| Unix | Unix box | Unix brain damage |
| Unix conspiracy | Unix International | Unixism |
| Unix man page | Unix manual page | Unix System V |
| Unix to Unix Copy | UnixWare | Unix weenie |
| Unix wizard | Unlicense | unnormalised |
| unproto | unshar | unshielded twisted pair |
| unstable | unswizzle | until |
| untyped | unwind-protect | unwind the stack |
| UN*X | unzip | up |
| uparrow | UPenn | upgradability |
| upgrade | upgradeability | upload |
| UPMAIL Tricia Prolog | upper bound | Upper Layer Protocol |
| upper memory block | Upper Side-Band modulation | Upright Database Technology AB |
| UPS | upstream | upthread |
| upward closure | Uranus | urban legend |
| URC | urchin | URI |
| URL | URL forwarding | URL redirection |
| URN | URouLette | US |
| us | usability | USAModSim |
| usa.net | US-ASCII | USB |
| USB 2.0 | USB Adapter Card Support | USB drive |
| USE | Usenet | Usenet news |
| Usenetter | USENIX | user |
| user acceptance testing | user base | User Brain Damage |
| User Datagram Protocol | user experience | user-friendly |
| user id | user identifier | user interface |
| user interface copyright | User Interface Language | user name |
| User Network Interface | user-obsequious | user-unctuous |
| Use the Source Luke | USG Unix | usim |
| USL | USP | USR |
| usr | US Robotics | U.S. Robotics, Inc. |
| USSA | UTC | UTF |
| UTF-8 | utility | utility-coder |
| utility program | utility software | UTOPIST |
| UTP | UTRC | UTSL |
| uucp | UUCPNET | uudecode |
| uuencode | UUNET PIPEX | UUPC |
| UX | uy | uz |
| V | V.10 | V.11 |
| V.17 | V.21 | V.22 |
| V.22bis | V.23 | V.24 |
| V.25 | V.25 bis | V.27 ter |
| V.28 | V.29 | V.32 |
| V.32bis | V.32ter | V.34 |
| V.35 | V.42 | V.42bis |
| V.90 | V.91 | va |
| vacuum tube | vadding | VAL |
| Valencia Simple Tasker | valency | Valid |
| validation | value | Value Added Network |
| value added reseller | value added retailer | valve |
| vampire tap | VAN | vanilla |
| vanity domain | vannevar | Vannevar Bush |
| vaporware | vapourware | VAR |
| var | varchar | variable |
| Variational Graphics eXtended | VAX | VAX DOCUMENT |
| VAXectomy | VAXen | vaxherd |
| vaxism | VAX MIPS | vaxocentrism |
| VAXset | VAXstation | VAX/VMS |
| VB | VBA | vbell |
| VBScript | vbx | vc |
| VCC filtering | VCD | VCID |
| VCL | VCODE | VCPI |
| VCR | vdiff | VDL |
| VDM | VDM++ | VDM-SL |
| VDSL | VDT | VDU |
| vdx | ve | vector |
| Vector C | vector font | vector graphics |
| vector processor | vector space | VECTRAN |
| VEE | veeblefeetzer | veeblefester |
| veeblefetzer | VEL | Vendor Independent Messaging |
| ventilator card | Ventura Publisher | Venus flytrap |
| verbage | verbiage | Verdi |
| verification | Verilog | Verilog SA |
| Veronica | Versa Module Europa | version |
| Version 7 | vertical application | vertical bar |
| vertical encoding | vertical loop combination | vertical microcode |
| Vertical Redundancy Check | vertical refresh rate | vertical scan rate |
| Very Efficient Speculative Parallel Architecture | Very high bit-rate Digital Subscriber Line | Very Large Database |
| Very Large Memory | Very Large Scale Integration | Very Long Instruction Word |
| Very Small Aperture Terminal | VESA | VESA Local Bus |
| VESPA | V.FAST | VFAT |
| V.FC | vg | VGA |
| VGQF | vgrep | VGX |
| VHDL | VHE | VHLL |
| vhost | VHS | vi |
| VIC-20 | victim cache | video |
| video adaptor | video card | Video Compact Disc |
| video compression | video conference | video conferencing |
| video dial tone | video display standard | video display terminal |
| Video Electronics Standards Association | Video Graphics Adapter | Video Graphics Adaptor |
| Video Graphics Array | video memory | Video on Demand |
| video RAM | video random-access memory | video terminal |
| videotex | Vienna Definition Language | Vienna Definition Method |
| Vienna Development Method | Vienna Development Method Specification Language | Vienna Fortran |
| Vietnamese | viewer | ViewPoints |
| Views | VIF | Vi Improved |
| VIM | Vincennes LISP | vines |
| Vine Technology | Vint Cerf | Vinton Cerf |
| Viola | virgin | virgule |
| Viron | virtual | virtual 86 mode |
| virtual address | virtual cache | virtual circuit |
| Virtual Circuit Identifier | virtual connection | Virtual Control Program Interface |
| Virtual Device Driver | Virtual Device Location | virtual disk |
| Virtual Home Environment | virtual host | Virtual LAN |
| Virtual Loadable Module | Virtual Local Area Network | Virtual Machine |
| virtual machine | Virtual Machine/Conversational Monitor System | Virtual Machine Environment |
| Virtual Machine/ESA | virtual machine manager | Virtual Machine/System Product |
| Virtual Machine/XA | virtual memory | Virtual Memory System |
| virtual path | virtual point of presence | virtual PoP |
| Virtual Private Network | virtual reality | Virtual Reality Modeling Language |
| Virtual Sequential Access Method | virtual server | virtual shredder |
| Virtual Software Factory | Virtual Storage Access Method | Virtual Storage Extended |
| Virtual Telecommunications Access Method | virus | viruses |
| visible bell | VisiCalc | visionary |
| visit | Visual BASIC | Visual Basic for Applications |
| Visual BASIC Script | visual bell | Visual C++ |
| Visual Component Library | Visual dBASE | Visual Display Unit |
| Visual FoxPro | Visual Interface | visualisation |
| visual language | visual programming | visual programming environment |
| visual programming language | VisualWorks | VITAL |
| VIVID | viz | VLAN |
| VLB | VLDB | Vlisp |
| VLIW | VLM | VLSI |
| VLSM | VM | VM/CMS |
| VME | VMEbus | VME Microsystems International Corporation |
| VM/ESA | VML | VMS |
| VM/SP | VM/XA | vn |
| vocoder | vocoding | VoD |
| voice mail | voice-net | Voice over IP |
| voice recognition | VoIP | volatile |
| volatile memory | volatile storage | volatile variable |
| voltage | Volume Table Of Contents | von Neumann architecture |
| von Neumann integer | von Neumann, John | von Neumann machine |
| von Neumann ordinal | voodoo programming | Voronoi diagram |
| Voronoi polygon | VOS | Voters Telecommunications Watch |
| voxel | V.pcm | VPL |
| VPN | VP-Planner | VQF |
| VR | VRAM | VRC |
| Vrije Universiteit, Amsterdam | VRML | VRTX |
| VSAM | VSAT | VSCM |
| VSE | V series | VSF |
| VSP | VSTa | VSX |
| VT | vt100 | vt220 |
| VTAM | VTC | VTOC |
| VTS | VTW | vu |
| VUE | VUIT | VULCAN |
| Vulcan death grip | Vulcan nerve pinch | vulnerability |
| vulture capitalist | VUP | VxD |
| VXI | VxWorks | W2K |
| W3 | W3C | W3 Consortium |
| WA-12 | wabbit | Wabi |
| WabiServer | wacco | Wafe |
| WAFL | WAIS | WAITS |
| wait state | waldo | walk |
| walking drives | walk off the end of | wall |
| wall clock time | wall follower | wallpaper |
| wall plate | wall time | WAM |
| WAN | Wang Laboratories | wango |
| Wang PC | wank | wannabee |
| want list | WAP | WAP Forum |
| warchalk | Ward Christensen | Ward Cunnigham |
| wardialer | wardriving | warez |
| WarGames | warlording | warm boot |
| Warm Silence Software | Warp | wart |
| washing machine | Wasserman | WATBOL |
| Watcom C/C++ | Watcom International | Watcom SQL |
| Watcom VX*REXX | Waterfall Model | water MIPS |
| WATFIV | WATFOR | wav |
| WAVE | wave a dead chicken | wave division multiplexing |
| Waveform Generation Language | wavelength division multiplexing | wavelet |
| wavetable | wavetable synthesis | WaZOO |
| wb | WBEM | WBMP |
| WBS | WCDMA | WCL |
| WD | WDASM | WDM |
| WE | Weak Head Normal Form | weakly typed |
| weak typing | weasel | web |
| Web 2.0 | web2c | web address |
| web authoring | Web-Based Enterprise Management | web browser |
| webcam | webcasting | WebCGM |
| WebCOMAL | web consortium | web cramming |
| WebCrawler | WebDAV | Web Distributed Authoring and Versioning |
| webhead | web host | web hosting |
| WEB - language | weblint | web log |
| web mail | webmaster | webmistress |
| webmonkey | WebObjects | web page |
| web proxy | Web Request Broker | web server |
| Web Service Definition Language | Web Services | Web Services Business Process Execution Language |
| website | web smith | Webster |
| Webster's Dictionary | wedged | wedgie |
| wedgitude | Weeble | weeds |
| weenie | Weenix | weighted search |
| well-behaved | well-connected | well-known port |
| well-ordered set | WEP | Wesley Clark |
| Western Digital Corporation | Westmount | wetware |
| wf | WFL | WfMC |
| WFW | WFWG | WG |
| WGL | whack | whacker |
| whales | whalesong | whatis |
| What's a spline? | What You Get Is What You Never Thought You Had | What You See Is All You Get |
| What You See Is What You Get | wheel | wheel bit |
| wheel wars | When It's Done | Whetstone |
| Which Stands For Nothing | while | while loop |
| Whirlwind | White Book | White book CD-ROM |
| white box testing | whitehat | White pages |
| white paper | white point | Whitesmiths style |
| whitespace | white trash | WHNF |
| whois | whole number | Whopper |
| WHQL | WIBNI | WIC |
| Wide Area Information Servers | Wide Area Network | Wide Area Telecommunications Service |
| Wideband ATM | Wide SCSI | widget |
| wi-fi | Wi-Fi Protected Access | Wi-Fi Protected Access Pre-Shared Key |
| wiggles | wiki | WiLAN |
| Wild_LIFE | wild card | Wilf Hey |
| William Gibson | William Hamilton | William Joy |
| WIMP | WIMP environment | win |
| Win2K | Win32 | Win32s |
| WIN386.SWP | Win 95 | Win 98 |
| winchester | windowing | windowing system |
| window manager | Window RAM | Window Random Access Memory |
| Windows | Windows 1 | Windows 2 |
| Windows 2000 | Windows/286 | Windows 2K |
| Windows 3.0 | Windows 3.1 | Windows 3.11 |
| Windows/386 | Windows 4GL | Windows 94 |
| Windows 95 | Windows 98 | Windows 9X |
| Windows Application Binary Interface | Windows CE | Windows for Workgroups |
| Windows for Workgroups 3.1 | Windows for Workgroups 3.11 | Windows Hardware Quality Labs |
| window shopping | Windows Internet Naming Service | Windows Management Interface |
| Windows ME | Windows Messaging | windows messaging |
| Windows Millennium Edition | Windows NT | Windows NT 3.1 |
| Windows NT 3.5 | Windows NT 4 | Windows NT 5 |
| Windows NT Network Model | Windows Open Service Architecture | Windows Registry |
| Windows sockets | Windows XP | Windows XP Pro |
| Windows XP Professional Edition | window system | Windoze |
| Wind River Systems | winged comments | winkey |
| WinMaker Pro | WINS | Winsock |
| WinSoft Products Ltd | wintel | WINZIP |
| wired | Wired Equivalent Privacy | wirehead |
| wireless | Wireless Application Protocol | wireless bitmap |
| Wireless Encryption Protocol | wireless hotspot | wireless local area network |
| Wireless Local Loop | Wireless Transport Layer Security | wirewater |
| WISCII | wish list | Wisp |
| within delta of | within epsilon of | wizard |
| Wizard Book | wizardly | wizard mode |
| WizDOM | wk1 | WLAN |
| WLL | WMA | wmf |
| WMI | WML | WMV |
| WNPP | WO | Wolfram Research, Inc. |
| WOM | woman | WOMBAT |
| wombat | wombat.doc.ic.ac.uk | WonderPop |
| Woodenman | woofer | WOOL |
| Worcester Polytechnic Institute | Word | word |
| Word for Windows | WordNet | WordPerfect |
| WordPerfect Corporation | word processing | word processor |
| word size | word spamming | WordTech |
| word wrap | workaround | Work Breakdown Structure |
| workflow | Workflow Management Coalition | workgroup |
| working as designed | working memory | working set |
| working set model | Work Needed and Prospective Packages | work path |
| worksheet | workstation | World Time |
| World-Wide Wait | World-Wide Web | World Wide Web Consortium |
| World Wide Web Worm | WORM | worm |
| wormhole | wormhole routing | WOSA |
| WOSA Extensions for Financial Systems | WOSA/XFS | wound around the axle |
| WPA | WPA Pre-Shared Key | WPA-PSK |
| WPG | WPI | WPL+ |
| wp-login.php | WPOP | wps |
| WRAM | wrap around | wrapper |
| wrats nest | wrb | write |
| WRITEACOURSE | write-back | write buffer |
| Write-Once Read-Many | write-only code | write-only language |
| write-only memory | write protect | write-through |
| write-thru | writing system | Wrong Thing |
| WRT | ws | WSBPEL |
| WSDL | WSFN | WSL |
| WTF | WTFPL | WTH |
| WTLS | Wumpus | WWW |
| WWW browser | WWWW | WYGIWYNTYH |
| WYSIAYG | WYSIWYG | WYSWYG |
| X | X-1 | X11R4 |
| X11R5 | X11R6 | X.12 |
| X2 | X.208 | X.209 |
| X.21 | X.214 | X.215 |
| X.216 | X.217 | X.219 |
| X.224 | X.225 | X.226 |
| X.227 | X.229 | X.25 |
| X.28 | X.29 | X.3 |
| X3J16 | X3T10 | X.400 |
| X.409 | X.500 | X.680 |
| X.75 | x86 | x86 processor socket |
| XA | Xaw | Xbase |
| xbeeb | xbm | XC |
| X client | X Consortium | Xcoral |
| xdbx | X-Designer | X.desktop |
| XDL | XDR | XDS 530 |
| XDS 940 | xDSL | Xemacs |
| XENIX | Xeon | xerox |
| XEROX Corporation | Xerox Data Systems Model 530 | Xerox Data Systems Model 940 |
| XEROX Network Services | Xerox Network System | XEROX PARC |
| Xerox Star | XFree86 Project, Inc. | XFS |
| Xfun | XGA | XGA-2 |
| XHTML | Xi | XIE |
| Xilinx, Inc. | Xilinx Netlist Format | X Image Extension |
| Xlib | xlisp | xls |
| XML | xmlrpc.php | XML schema |
| XML Template Pages | XML User-Interface Language | XMM |
| XMODEM | XMODEM-1K | xmosaic |
| XMS | XNF | xnf2ver |
| XNS | XOFF | XON |
| XON/XOFF | Xopen | X/Open |
| X/open Portability Guide | X/Open System Interface | xor |
| XP | XPC | XperCASE |
| XPG | XPG3 | XPL |
| xpm | XPOP | XP Pro |
| Xpress Transport Protocol | X protocol | xref |
| XRemote | XRN | XSB |
| XScheme | x-scm | XSD |
| X server | XSI | XSL |
| XSLT | XT | Xt |
| XT bus architecture | xterm | X terminal |
| XTI | XTP | XTP Forum |
| XTRAN | XUI | XUL |
| Xv++ | XVGA | XView |
| XVT | X-Windows | X Window System |
| XWIP | xxgdb | XXX |
| Xy-pic | xyzzy | Y |
| Y2K | YA- | Yaa |
| YABA | yacc | YADE |
| YAFIYGI | YAGNI | Yahoo |
| Yale Haskell | Yamaha | YAML |
| YAML Ain't Markup Language | yank | YAPS |
| YASOS | YAUN | Yay |
| ye | Year 2000 | Yellow |
| Yellow Book | Yellow Book CD-ROM | Yellow Book, Jargon |
| Yellow Box | Yellow Pages | yellow wire |
| Yerk | Yet Another | Yet Another Compiler Compiler |
| Yet Another Scheme Object System | Yet Another Yacc | YGMTPO |
| YLISP | YMMV | YMODEM |
| YMODEM-G | yocto- | Yoda condition |
| YOL Computers | yotta- | yottabyte |
| You are not expected to understand this | You aren't gonna need it | Yourdon |
| Yourdon/Constantine | Yourdon/Demarco | Yourdon, Inc. |
| Yourdon methodology | Your mileage may vary | youtube.com |
| YouTube, Inc. | Yow! | yoyo mode |
| YP | YSM | yt |
| YTalk | yu | Yu-Shiang Whole Fish |
| Z | Z++ | Z-1013 |
| Z180 | Z3 | Z39.50 |
| Z8 | Z80 | Z8000 |
| za | ZAP | zap |
| ZAPP | Z-buffer | ZEBRA |
| Zed | Zen | zen |
| ZENO | zepto | Zermelo Fränkel set theory |
| Zermelo set theory | ZERO | zero |
| Zero and Add Packed | zero assignment | zero-content |
| Zero Insertion Force | zeroth | ZEST |
| ZetaLisp | zetta- | zettabyte |
| Zeus | ZFC | ZF expression |
| ZIF | zigamorph | ZIL |
| Zilog | Zilog Z280 | Zilog Z8 |
| Zilog Z80 | Zilog Z8000 | Zilog Z80000 |
| Zilog Z80A | zip | Zipcode |
| Zip disc | Zip disk | Zip Drive |
| zip file | zip function | zipped |
| zipped file | zipperhead | zm |
| ZMODEM | ZOG | ZOLA Technologies |
| zombie | zombie process | zone |
| Zoo | zoo | zoom |
| Zoomer | ZOPL | zorch |
| Zork | zorkmid | z/OS |
| zr | zsh | Z shell |
| ZUG | Zulu time | ZUSE |
| Zuse | Zuse, Konrad | zw |
| ZX-80 | ZX-81 | zxnrbl |
| ZX Spectrum | Zynet Ltd. | ZyXEL |
| { | {$formKeywords} | {IDF} |
| {log} | {searchTerms} | | |
| } | ~ | ~# |
| £ | µCurse | |
