| /dev/null | Aurora | automation |
| ayacc | b | BABEL |
| BABYLON | BACAIC | Bachman |
| backbone site | backgammon | back-propagation |
| BAD | bag on the side | BALITAC |
| bamf | bang | bang on |
| banner | bare metal | barf |
| barfulation | barfulous | barney |
| Baroque | baroque | baseband |
| bash | BASIC AUTOCODER | BASIC V |
| bathtub curve | baz | BBC Microcomputer |
| BC | BCL | BC NELIAC |
| BCNU | BEA | Bedrock |
| BELL | Bell Communications Research, Inc | Bell Laboratories |
| bells, whistles, and gongs | Berkeley EDIF200 | Berkeley Network |
| berklix | Bernoulli principle | Bertrand |
| Bertrand Meyer | BETA | beta |
| beta abstraction | beta reduction | BiCapitalisation |
| bi-endian | BIFF | biff |
| Big bag of pages | BIG-LAN | bigot |
| binary exponential backoff | binary tree | BIOR |
| BIP | BIPS | Birds Of a Feather |
| BISDN | Bison++ | bit bang |
| bit bashing | bitblt | bit twiddling |
| bitwise complement | bixie | BJC4000 |
| black art | black hole | blargh |
| blast | blat | BLAZE |
| BLAZE 2 | bletcherous | B-LINE |
| blinkenlights | blit | blivet |
| Bloggs Family, the | Blosim | blow an EPROM |
| blow past | blow up | BLOX |
| BLT | Blue | blue wire |
| blurgle | BMASF | BNF |
| BNR Pascal | BNR Prolog | boa |
| board | boat anchor | Bob |
| BOCS | Boehm B. | BOF |
| bogon | bogon filter | bogon flux |
| bogosity | bogue out | boink |
| bondage-and-discipline language | bonk/oif | Bookreader |
| Bookviewer | Booster | BOOTP |
| boot virus | Border Gateway Protocol | BOSS |
| bottom-unique | bounce | bounce message |
| boundary scan | bound variable | bournebasic |
| Bourne shell | boxen | brain-damaged |
| brain-dead | brain dump | branch to Fishkill |
| Brazil | break | break-even point |
| breath-of-life packet | BRIDGE | Brilliant |
| bring X to its knees | broadcast | broken |
| brouter | BRUIN | BUAF |
| BUAG | bubble memory | bubble sort |
| bucky bits | buffer | bug-compatible |
| bug-for-bug compatible | buglix | built-in |
| Built-in Self Test | bulletproof | bum |
| bump | burble | Burge's Language |
| buried treasure | Butterfly Common LISP | Butterfly Scheme |
| buzz | bwBASIC | BWQ |
| by hand | CAD/CAM | CADET |
| CAFE | CAGE | CAIS-A |
| CAiSE | Calculus of Communicating Systems | Calendar Application Programming Interface |
| Caliban | California State University San Marcos | call-by-value |
| call-by-value-result | CALS | CAM-6 |
| Cambridge Lisp | CAMIL | Caml Light |
| Campus Wide Information System | Canada | Candle |
| canonical name | Captain Abstraction | cardinal number |
| CARDS | caret | careware |
| CAS 8051 Assembler | CASE Data Interchange Format | CASE framework |
| CASE*Method | CASE SOAP III | CASE tools |
| casters-up mode | CAT | CATO |
| CBASIC | C Beautifier | C/C++ |
| CCalc | CCIRN | CCITT |
| CCL | CCLU | ccmail |
| CCR | CCTA | CDE |
| CDF | CDL | cd tilde |
| Cecil | Cedar | CEEMAC+ |
| CEI-PACT | CELIP | Cellang |
| CELLAS | CEN | Centrum voor Wiskunde en Informatica |
| cforth | CFP | CHIP-48 |
| C-Interp | CIP Language | CIRcuit CALculus |
| CML | COMMEN | Compas Pascal |
| COMPASS | Compiler-Compiler | compiler-compiler |
| compiler jock | Compiler Language for Information Processing | Compiler Target Language |
| complete | complete graph | complete lattice |
| Complex Instruction Set Computer | complexity analysis | COMPREHENSIVE |
| COMPROSL | Compu$erve | Compulink Information eXchange |
| Compusult Ltd. | Computational Adequacy Theorem | COMTRAN |
| control tty | conversion to iteration | convert.f90 |
| cooked mode | COOL | Coordinating Committee for Intercontinental Research Networks |
| copper | Copper Distributed Data Interface | coprocessor |
| copying garbage collection | CORAL | CORAL 66 |
| CORC | core gateway | corge |
| Cornell List Processor | Cornell Theory Center | Coroutine Pascal |
| Corporation for Open Systems | CORREGATE | Correlatives and Conversions |
| Cortex | CORTL | COSE |
| COSINE | cosmic rays | cowboy |
| COWSEL | CP | CPL |
| CPS | CPU Wars | crank |
| CrApTeX | crash | Cray instability |
| crayola | crayon | creationism |
| creeping elegance | C-Refine | CREW PRAM |
| crippleware | Crisis Software | CRISP |
| crisp | critical mass | critical section |
| CRL | crock | cross-assembler |
| cross-post | cross software | CROSSTABS |
| CROW PRAM | crudware | cryptanalysis |
| Crypt Breakers Workbench | Crystal | CS-4 |
| C++SIM | CSL | CSM |
| CSMA/CD | CSNET | CSO |
| CSP/80 | CS/PCode | CS-Prolog |
| CSPS | CSP-S | CS/QCode |
| CSSA | CSS/II | CSTools |
| CTY | Cube | cube |
| CUCH | Culler-Fried System | CUPID |
| CUPL | curly bracket | currying |
| curseperl | curses | CUSI |
| cuspy | custom | cut a tape |
| CWIC | C with Classes | Cy486SLC |
| cyberpunk | CYBIL | CYCL |
| cycle drought | cycle of reincarnation | D |
| DAA | DACAPO | DACNOS |
| DACTL | Daisy | DAISY 201 |
| DANTE | DAP Fortran | DAPLEX |
| DARE | DAS | DASL |
| database manager | database server | DATABUS |
| Datacom | data driven | Data Encryption Algorithm |
| Data Encryption Key | Data Encryption Standard | datagram |
| data hierarchy | Datamation | DataViews |
| DataVis | DAU | DAZIX |
| dBXL | DCA | DCALGOL |
| DCDL | DCE | DCL |
| D. C. Power Lab | dd | DDCMP |
| DDE Manager | DDIF | DDT |
| DEACON | dead | death code |
| Death Star | decay | DECdesign |
| DECdns | DEChead | decision support |
| decision support database | deckle | DECnet |
| Decus cpp | DEC Wars | DECwindows |
| DECwrite | DED | deep magic |
| deep space | de facto standard | Defense Communications Agency |
| Defense Data Network | Defense Data Network Network Information Center | Defense Information Systems Agency |
| deferral | degree | dehose |
| delint | Delirium | delta |
| Delta-4 | Delta-Prolog | DELTASE |
| demand driven | DeMarco | demented |
| Demeter | demo | demo version |
| depeditate | deprecated | descent function |
| Descriptive Top-Level Specification | Design System language | desktop manager |
| DESQview | DESY | DETAB |
| development | devo | DEX |
| DFA | DFC | DGL |
| DG/L | DIALOG | dialup |
| DIAMAG | diameter | Diamond |
| DIBOL | dictionary flame | diff |
| digest | Digicom | digit |
| Digital Express Group, Inc. | Digital Library Initiative | Digital Signal Processing |
| DIGITAL Standard MUMPS | dike | DIN |
| ding | dink | DinnerBell |
| DINO | dinosaur | dinosaur pen |
| Direct Connection | directed acyclic graph | directed graph |
| Directory Access Protocol | Directory System Agent | Directory User Agent |
| dirtball | dirty power | disjoint union |
| Disjunctive Normal Form | Display PostScript | Dissociated Press |
| Distributed Computing Environment | distributed database | Distributed Eiffel |
| Distributed Management Environment | Distributed Operating Multi Access Interactive Network | Distributed Processes |
| Distributed Smalltalk | distributed system | diverge |
| divisor | DL/1 | DLCI |
| DLG | DL/I | DLM |
| DMAD | dmake | DMALGOL |
| DNS | doc | Document Image Processing |
| Document Style Semantics and Specification Language | DOCUS | DoD-1 |
| dodgy | DOE | dogcow |
| dogpile | dogwash | DOL |
| DOMF | dongle-disk | donuts |
| doorstop | DOS Protected Mode Interface | dot address |
| dotted quad | double bucky | doubled sig |
| DOW COMPILER | down | DP |
| DPB | DPer | dpi |
| DPL | DPL-82 | dpSather |
| draco | drag and drop | DRAGON |
| dragon | Drawing eXchange Format | DRECNET |
| DRM | drop cable | drop-ins |
| drop on the floor | drop-outs | DRUCO I |
| drugged | drum | drunk mouse syndrome |
| DSE | DSM | DSP32 Assembly Language |
| DSP56000 | DSP56001 | dsp56165-gcc |
| dsp56k-gcc | DSP/C | DSS |
| DST | DTALGOL | dual-attached |
| dual ported | Duff's device | dumpster diving |
| dup killer | Duplex High Speed Data | Durra |
| dusty deck | dweeb | DWIM |
| Dylperl | dynamic adaptive routing | dynamic binding |
| DYNAMO | DYSAC | DYSTAL |
| eager evaluation | Eagle | EAROM |
| earthquake | Ease | EASE II |
| EASIAC | EAST | Eastern Washington University |
| EASY FOX | Ebone | EC++ |
| ECAP II | Echidna | echo |
| echo cancellation | ECHT | ECIP2 |
| ECLIPSE | ECMA | Econet |
| ECOOP | ECP | ECRC-Prolog |
| ECSL | ECSP | ECSS II |
| ECSSL | EDA | EDIF |
| EDIFACT | Edinburgh Prolog | Edinburgh SML |
| Edison | EEPROM | EER |
| Eh | EHTS | Eiffel source checker |
| EL1 | el(alpha) | Elan |
| elder days | elegant | elephant |
| elephantine | elevator controller | ELF |
| ELLA | Ellemtel | ELLIS |
| ELMAMETA | ELP | EMA |
| EMDIR | Emerald | Emitter Coupled Logic |
| EML | emulator | EMX |
| Encapsulated PostScript | encapsulation | Enhanced Dynamic Random Access Memory |
| enhancement | Ente Nazionale Italiano di Unificazione | Envoy |
| EOF | EOL | EOUG |
| EPILOG | EPROS | EPSIMONE |
| EqL | EQLOG | EQLog |
| Eqn | Equel | era |
| ERCIM | EREW PRAM | ERFPI |
| ergonomic | ergonomics | Eris |
| ESF | ESI | esim |
| ESL | ESLPDPRO | ESP |
| Estelle | Esterel | EstPC |
| ET | ET++ | EtherGate |
| Ethernet meltdown | Eudora | EULER |
| EuLisp | EUnet Ltd. | Euphoria |
| Eureka | Eureka step | Eurocard |
| Euro-ISDN | EuropaNET | Eva |
| evolutionary algorithm | evolutionary computation | evolutionary programming |
| evolution strategy | examining the entrails | EXAPT |
| Excelan | Excelerator | exception |
| exception handler | EXE | exercise, left as an |
| eXodus | EXOS | explicit parallelism |
| Exploratory Data Analysis | Express | Extended Fortran Language |
| Extended ML | Extended Pascal | Extended Tiny |
| extensional | extensional equality | Exterior Gateway Protocol |
| eXternal Data Representation | EXTRA | EZ |
| f2c | F68K | FAC |
| factor | FAD | failure |
| fall over | FALSE | faradise |
| FARNET | fas | FASBOL |
| FASE | F-code | FCP |
| fdlibm | fear and loathing | feature creature |
| featurectomy | Federal Geographic Data Committee | Federal Networking Council |
| feed-forward | Feel | feep |
| feeper | feeping creature | feeping creaturism |
| FEL | fence | fencepost error |
| Fetch | ffccc | FFP |
| FGHC | FGL | FGL+LV |
| FGRAAL | Fiber Distributed Data Interface | FIDIL |
| field circus | Fifth | File Attach |
| File Composition | File Request | file server |
| file signature | File Transfer Protocol | filk |
| filter | firefighting | firewall code |
| fireworks mode | Firmware | first generation language |
| first-order | FITNR | FITS |
| flaky | FLAP | flarp |
| flat | flatten | Fleng |
| Flex++ | flib | FLIC |
| FLIP | F-Logic | FLOP |
| FLOPS | FLOW-MATIC or FLOWMATIC | FLPL |
| FMQ | FMS | FNAL |
| FOAF | FOCAL | FOCL |
| FOD | FOIL | followup |
| fontology | foogol | FOOL |
| Fools' Lisp | Foonly | FOOP |
| FORC | Force | ForceOne |
| ForceTwo | foreground | for free |
| FORMAC | FORMAL | Formula ALGOL |
| Forsythe | Fortran 66 | Fortran 77 |
| Fortran 90 | Fortran D | Fortran I |
| Fortran II | Fortran III | Fortran IV |
| Fortran-Linda | Fortran M | Fortran-Plus |
| Fortran V | Fortran VI | FORTRUNCIBLE |
| fortune cookie | forward analysis | forward chaining |
| forward delta | FORWISS | For Your Information |
| fossil | foundation | four-colour glossies |
| FP2 | fpc | frame pointer |
| framework | Framework 4 | framing specification |
| FRANK | FRED | fred |
| frednet | free | FreeHEP |
| Freenet | freerexx | free variable |
| freeze | Friend | FRINGE |
| frink | fritterware | FRL |
| FRMT-FTRN | frob | frobnicate |
| frobnitz | frogging | Frolic |
| front end | front-end processor | fry |
| FSL | fsplit | FTAM |
| FTP by mail | FTTP | fudge |
| fudge factor | FUDGIT | FUD wars |
| Fuel-can | full-custom | fully lazy lambda lifting |
| Fun | functional | functional unit |
| function application | functor | funky |
| FUNLOG | FunnelWeb | funny money |
| FUSE | FUSION | fuzzball |
| fuzzy logic | fuzzy subset | fweep |
| FWIW | FX-87 | FYA |
| FYI4 | G2 | gabriel |
| GADS | Gaelic | gag |
| GAIA | Galileo | gamut |
| GAN | GANDALF | gang bang |
| GAPLog | Gargoyle | Garnet |
| GARP | garply | GAT |
| GATE | gated | GC |
| GCL | G-Code | GDMO |
| GDPL | GEA | GEANT |
| Gedanken | gedanken | geef |
| geek out | GEI | General Magic |
| General Protection Failure | General Purpose Graphic Language | General Purpose Language |
| generate | generation | Genesia |
| genetic algorithm | GENOVA | Gentleman's Portable Coroutine System |
| GEN-X | Geographical Information System | GEOS |
| GEPURS | Gerald | ghostview |
| GIFF | GIM-1 | GIN |
| GINA | Ginger | GIP |
| GIPS | GIRL | GKS-3D |
| GL | Glammar | glark |
| GLASS | glass | glassfet |
| glass tty | Glish | Glisp |
| glitch | Global Network Navigator | glork |
| Glypnir | GMD Toolbox for Compiler Construction | GNU assembler |
| GNU BC | GNU DC | GNU E |
| GNUMACS | GNU Privacy Guard | GNU superoptimiser |
| go flatline | GOL | golden |
| GOM | gonkulator | Gopher object type |
| gorets | gorilla arm | go root |
| gorp | GOSMACS | Gosperism |
| GOSPL | GP | GPF |
| GPL | GPSS | GPX |
| GRAAL | GRAF | Graffiti |
| GRAIL | GRAIN | GRAM |
| grammatical inference | Grapes | Grapevine |
| Graphic Language | graph reduction | graph rewriting system |
| GRAPPLE | GRAS | GRASP/Ada |
| GRASPIN | grault | Gray |
| Great Runes | Green Book CD-ROM | green card |
| green lightning | green machine | GRG |
| GRIB | grick | grilf |
| GRIND | grind | grind crank |
| GRIP | gripenet | gritch |
| grix | groff | grok |
| gronk | gronked | group |
| grovel | grunge | GSL |
| Guide | guiltware | gunch |
| GVL | GW-Ada | gweep |
| GWM | Gypsy | h |
| hacker humour | Hacking X for Y | hack on |
| hack value | ha ha only serious | hair |
| HALMAT | halting problem | hammer |
| handshaking | handwave | hang |
| happily | hardwarily | Harvest C |
| has the X nature | hat | Hayes |
| HBOOK | hc | HCI |
| HCLP | HCPRVR | HCS |
| HDFL | header | head normalisation theorem |
| heads down | heavyweight | heavy wizardry |
| Helen Keller mode | Helix | HEP |
| HEPDB | HEPiX | HEPnet |
| HEPVM | HEQS | HERA |
| heterogeneous | Hewlett-Packard | Hewlett Packard Precision Architecture |
| Hewlett-Packard Visual Engineering Environment | HHOK | hidden flag |
| hierarchical routing | hierarchy | high bit |
| Higher Education National Software Archive | higher-order function | higher-order macro |
| high-level language | high moby | High Performance Computing and Communications |
| HIGZ | HiLog | hing |
| HINT | HiPAC | hirsute |
| HISTORIAN | HLISP | Hobbit |
| hobbit | HOL | HOL-88 |
| HOL-90 | HOL-UNITY | holy wars |
| home machine | HOOK | horizontal application |
| hose | HOS-STPL | hostname |
| hotlink | hot spot | HOTT |
| house wizard | HPcode | HPCode-Plus |
| HP-GL/2 | HPL | HPLOT |
| HTLM | HTTL | HTTP/1.0 |
| HUGO | Human Interface Technology Laboratory | hung |
| hungry puppy | Hybrid | Hyper-C |
| HyperCard | hypercube | Hyper-Man |
| HyperNeWS | Hyperscript | hyperspace |
| Hyperstrict | HyperTalk | hysterical reasons |
| HyTime | IAD | IAM |
| I-APL | IAR | IBM 801 |
| IBM discount | Iburg | I-CASE |
| ICES | ICETRAN | Iconicode |
| IC-Prolog | ICSI | ICWS |
| IDAMS | IDEAL | IDEF |
| idempotent | I didn't change anything! | Id Nouveau |
| IDOL | IDS/I | IEEE 1076 |
| IEEE 802.2 | IEEE 802.5 | IFAC |
| ifdef out | IFIP | IFX |
| IGES | IGL | IITRAN |
| ILISP | ill-behaved | ILLIAC |
| ILOC | Ilog Solver | Imago Europe plc |
| Imago On-line | imake | inc |
| incantation | include | include war |
| incremental constraint solver | inductive relation | inference engine |
| INFN | Infobahn | Info BASIC |
| Information Algebra | Information Builders | Information Innovation |
| Information Management | Information Processing Language | Information Resource Management |
| Information Systems Factory | Information Technology Infrastructure Library | Informix |
| INGRES | InnovAda | inode |
| insanely great | INSIGHT | Institute for Global Communications |
| Institute of Electrical and Electronics Engineers, Inc. | instruction scheduling | Integrated Systems Architecture |
| Intel Literature Sales | INTERACTIVE | Interactive CourseWare |
| Interactive Data Language | Interagency Interim National Research and Education Network | InterBase |
| Interest Group in Pure and Applied Logics | interesting | Interface Architect |
| Interface Definition Language | Interface Description Language | Interior Gateway Protocol |
| Interlan | Interleaf | INTERLINK |
| Interlisp-10 | Intermedia Interchange Format | Internet Architecture Board |
| Internet-Draft | Internet Engineering and Planning Group | Internet Engineering Steering Group |
| Internet Experiment Note | Internet Express | Internet Monthly Report |
| Internet Public Library | Internet Registry | Internet Research Task Force |
| internetworking | Internex On-Line | interoperability |
| interoperable database | Interpress | interrupt list |
| interrupt priority level | interrupt request | InterViews |
| I-OOA | IPL | IPS |
| IQ | IQL | IRDS |
| Iris | iron | iron box |
| Ironman | ironmonger | irrefutable |
| ISDE | ISEE | ISETL |
| ISIS | ISL | ISLisp |
| ISMAP | ISO 9000 | ISO Development Environment |
| ISO Pascal | ISPL | ISPS |
| ISV | ITS | Ivan |
| Ivan Sutherland | Iverson's Language | ivs |
| IVTRAN | IVY | IWBNI |
| IYFEG | J | J3 |
| J73 | jack in | JAD |
| Jade | JaM | jam |
| Janus | JFCL | jiffy |
| jitter | jock | joe code |
| Joint Academic NETwork | Joyce | JPLDIS |
| JRL | JRST | JS |
| JSA | JTC1/SC24 | JTS |
| juggling eggs | Jughead | jump off into never-never land |
| jump trace buffer | Juno | jupiter |
| Jym | K5 | Kali |
| KAP | Karel | KBMS |
| KEE | Keldysh Institute of Applied Mathematics | ken |
| KeyNote Software | keypal | keyword |
| Khornerstone | KIBO | kiboze |
| kick | Kid | killer micro |
| killer poke | kill file | kiosk |
| KIPS | KISS | KISS Principle |
| KL0 | KL1 | Klerer-May System |
| klone | KL-ONE | KMODEL |
| Knights of the Lambda-Calculus | Knowledge Management System | knowledge representation |
| Knowledge Systems Laboratory | Knuth | Korn Shell |
| kremvax | KRL | L6 |
| Lab for Computer Science | LaborNet | Lace |
| lace card | Lakota | LAMBDA |
| lambda abstraction | lambda lifting | LAMINA |
| LANCE | Language H | language lawyer |
| Language Sensitive Editor | language-sensitive editor | languages of choice |
| LANL | LAP | LAP4 |
| LAPD | Larch | Larch/C++ |
| Large Installation Systems Administration | larval stage | lase |
| latch | LAU | LAVA |
| LAX | lazy list | lazy sml2c |
| LBL | LCC | LCL |
| LDB | LDL | LDL1 |
| LDT | LE/1 | Leaf Distribution Limited |
| leaf site | Lean | LEAP |
| leapfrog attack | least recently used | LECOM |
| LeFun | legal | legalese |
| LEGOL | Le-Lisp | Lempel-Ziv Welch compression |
| LERP | LEVEL5 OBJECT | level-sensitive scan design |
| LG | LGDF | LGEN |
| LIDO | LiE | Life is hard |
| LIFIA | LIGHT | like this |
| Lila | Lily | LIMDEP |
| LIMP | Lincoln Reckoner | linear address space |
| linear function | Linear Graph Notation | line probing |
| line starve | Lingo | LINGOL |
| Link Access Procedure on the D channel | Link Access Protocol for Modems | link-dead |
| LINPACK | lint | Linux Network Administrators' Guide |
| LIPL | LIS | LISP 1 |
| LISP 1.5 | LISP 2 | LISP70 |
| LISP A | Lispkit Lisp | Lisp-Linda |
| Lisp Object-Oriented Programming System | LISP, Objects, and Symbolic Programming | Lisptalk |
| LispView | Listproc | Liszt |
| literature | LITHE | lithium lick |
| LITTLE | Little Smalltalk | live data |
| Live Free Or Die! | liveware | LLM3 |
| LM3 | LML | LM-Prolog |
| LNF | LO | L&O |
| load | lobotomy | locality |
| local loopback addresses | locals | locked and loaded |
| locked up | Locus | LogC |
| logical | logical relation | logic emulator |
| logic gate | Logic Replacement Technology | LOGIN |
| LOGISCOPE | LOGLISP | LOGOL |
| LOOK | Looking Glass | LOOKS |
| loop combination | loose bytes | LOP |
| lord high fixer | Lore | lost in the noise |
| LOTIS | lots of MIPS but no I/O | Lotus Notes |
| Lout | low-bandwidth | LPG |
| LPL | lpr | LPS |
| LPT | LRLTRAN | LSB |
| LSL | L-Soft | LSYD |
| LT-2 | LTR | LTR3 |
| LUCID | lump uncurrying | lunatic fringe |
| LUSTRE | LYaPAS | LYNX |
| Lynx | LynxOS | Lynx Real-Time Systems |
| LYRIC | LZ77 compression | LZ78 compression |
| lzexe | m2 | M2toM3 |
| M3 | m4 | M5 |
| MAC | MAC-360 | MAC address |
| MACAnalyst | Macaulay | MACDesigner |
| macdink | MACE | Mach |
| Machiavelli | machinable | machine |
| MAchine INdependent SAIL | machine learning | machoflops |
| Macintoy | Macintrash | MACL |
| MACRO | macro | macro- |
| macrology | Macro SAP | MACSYMA |
| MacX | Madaline | MADCAP |
| MADTRAN | MAGIC | magic |
| magic cookie | Magic Paper | Magic Switch Story |
| MAGNUM | Magritte | Maisie |
| Makedoc | makefile | Maker Interchange Format |
| MALI | malloc | management |
| manged | mangle | mangler |
| manularity | MAO | Maple |
| Maril | marketroid | Markov |
| Markowitz | mark-sweep garbage collection | Mars |
| MARSYAS | Martian | Martin Marietta Laboratories Moorestown |
| MARVIN | MAS | MASCOT |
| MASM | MasPar Unity | Massachusetts Institute of Technology |
| massage | Massively Multiplayer Online Game | Matchmaker |
| Mathcad | Mathematical Analysis without Programming | MATHLAB |
| MATH-MATIC or MATHMATIC | math-out | Matrix |
| Matrix Compiler | maximal free expression | MAXIMOP |
| Maxis Software | MBASIC | Mbogo, Dr. Fred |
| MBONE | MCC | McG360 |
| MCP-1600 | mcvax | MDL |
| meatware | MegaHertz | megapenny |
| MEGO | MELD | MELDC |
| Melinda | member function | MENTOR |
| menuitis | MENYMA/S | Mercury Autocode |
| MERISE | Mesa | message |
| message passing | mess-dos | META 5 |
| MetaCard | Meta-CASE tool | Meta-Crystal |
| METAFONT | Meta-II | METAL |
| metalanguage | metaprogram | Met-English |
| METEOR | me too | Metropolitan Area Network |
| M-expression LISP | MFC | MIB Variable |
| Mic-1 | Mic-2 | microarray |
| microcentury | Microcom Networking Protocol | microcomputer |
| MicroDroid | MicroEmacs | microfloppies |
| microfortnight | microLenat | Micro ML |
| Micronetics Standard MUMPS | microPLANNER | microReid |
| Microware Corporation | MIDAS | Midas |
| middleware | mid-level network | MILITRAN |
| milliLampson | MILNET | mimencode |
| MIMOLA | Minerva software | Mini-ML |
| Mini PL/I | MINITAB II | MINUIT |
| minus | minus infinity | MIPS R2010 |
| MIPS R3000 | MIPS R4000 | Miracula |
| misbug | misfeature | miswart |
| MIX | MIXAL | MIX Communications |
| ML-2000 | MLAB | MLISP |
| ML Kit | MLL | ML-lex |
| ML-Linda | ML Threads | ML-Twig |
| Mma | mmap | MML |
| MOBSSL-UAF | mockingbird | Mock Lisp |
| modal | MODCAL | mode bit |
| MODEF | MODEM7 | moderator |
| MODSIM II | Modula-2* | Modula-2+ |
| Modula-3 | Modula-3* | Modula-3pi |
| Modula-P | Modula-Prolog | Modula/R |
| Modular C | Modular Prolog | Modulex |
| molly-guard | monitor | monkey up |
| monoid | monotonic | Montage |
| Moof | Moore bound | Moore graph |
| Mops | MORAL | MORTRAN |
| Moscow ML | Mosiac | Most Significant Bit |
| Motif | Motorola 68050 | Motorola 88000 |
| Mouse | mouse ahead | mouse around |
| MP-1 | MPL II | M-Prolog |
| MPS III | MPSX | MPV |
| MRS | mtc | Muddle |
| muFP | mu-law | Mul-T |
| MultiCal System | multicast addressing | multicast backbone |
| Multi-Garnet | multihomed host | multilayer perceptron |
| Multimedia Internet Mail Extensions | Multi-Pascal | Multiple Instruction/Multiple Data |
| Multiplexor Channel | MultiScheme | mumblage |
| mumble | munch | munching |
| munching squares | munchkin | mung |
| munge | museum | mutter |
| N10 | NAG | nailed to the wall |
| naive | naive user | nano- |
| nanotechnology | Napier | NAPLPS |
| NAPSS | nasal demons | NASTRAN |
| National Information Services and Systems | National Research and Education Network | National Science Foundation Network |
| National Software Reuse Directory | National Spatial Data Infrastructure | Native Language System |
| NATURAL | Natural English | Natural Language Information Analysis Method |
| Nawk | NBS | NCS |
| neat hack | Nebula | neep-neep |
| negation by failure | NELIAC | Neon |
| neophilia | Neptune | NERECO |
| NetBEUI | NetBIOS | NetBOLLIX |
| netCDF | Netfind | NETL |
| netload | Netmarq Limited | netnews |
| net.personality | net.police | netrock |
| netter | Network Definition Language | Network extensible Window System |
| Network Information Center | Network News Transfer Protocol | Network Operations Center |
| Network Termination | Network Time Protocol | Neutral Interconnect |
| New Flavors | newgroup wars | New Jersey |
| NeWS | NewsClip | Newspeak |
| Newsqueak | New Testament | Newton |
| NewWave | NewYacc | New York State Educational Reasearch ETwork |
| New York University | Nexpert Object | NFQL |
| NFT | NGL | NIAL |
| NIAL Systems Ltd. | NIAM | NICE |
| nick | nickle | NICOL I |
| Nightmare File System | NIH | NIHCL |
| NIKL | NIL | NISO |
| NJCL | NODAL | Nodal Switching System |
| noddy | node | NOMEX underwear |
| nondeterministic | nonlinear | Non-Maskable Interrupt |
| non-optimal solution | Nonpareil | nontrivial |
| non-uniform quantising logarithmic compression | no-op | NOR |
| NORC COMPILER | NorCroft | NORD PL |
| normal order reduction | NorthWestNet | NoteCards |
| Nother | not ready for prime time | NPL |
| NPPL | N-Prolog | NQS |
| Nqthm | NSE | NT |
| NuBus | nu-calculus | NUCLEOL |
| nude | nuke | numbers |
| Numeris | Nuprl | NU-Prolog |
| Nu Thena | NYU OMNIFAX | O2 |
| OATH | Ob- | OBDC |
| Oberon-V | OBJ | OBJ0 |
| OBJ2 | ObjectCenter | Object CHILL |
| object code | Object Compatibility Standard | Objective PASCAL |
| ObjectLOGO | Object management system | Object Oberon |
| Objectworks | Object Z | Objlog |
| OBJT | ObjVlisp | ObjVProlog |
| Obliq | OBSCURE | observational equivalence |
| OCAL | OCODE | ODA |
| Ode | off-side rule | off the trolley |
| OIL | OLDAS | old fart |
| Old Testament | OLGA | O-Logic |
| OMA | Omega-algebraic | Omega test |
| OMF | OMNICODE | OMNIFAX |
| OMNITAB | OMTool | Ondine |
| one-line fix | ones complement | On-Line Computer system |
| OnX | OOGL | OOPS |
| OOPSLA | OOSD | OOZE |
| Opal | open | Open Distributed System Architecture |
| Open Network Computing | Open Scripting Architecture | open switch |
| OPS83 | Optical Time Domain Reflectometry | optimise |
| optimism | OPTRAN | Oracle*CASE |
| Orbit | Orca | order-embedding |
| ordering | OREGANO | O'Reilly and Associates |
| Orwell | OS/2 | OSA extension |
| OSCAR | OSSL | OTT |
| overrun | overrun screw | Owl |
| Oz | oz | P+ |
| p2c | P3L | P4 |
| PACE | packet | Packet Assembler/Disassembler |
| Packet Switch Node | PACT I | PACTOLUS |
| padded cell | Paddle | PAGE |
| Page Description Language | PAISley | PANON |
| Pansophic | Paper Feed Control Character | PARADE |
| PARADIGM PLUS | Paradigms of AI Programming | Paradise |
| Paradox Application Language | Paragon | Paralation |
| Paralation C | Paralation LISP | ParAlfl |
| Parallel Presence Detect | parallel reduction | Parallel SML |
| parameter RAM | parametric polymorphism | paraML |
| ParaSoft Corp | Parasol | parentheses |
| Paris | Parkinson's Law of Data | Park-Miller |
| Parlance | Parlog | Parlog++ |
| parm | PARMACS | ParMod |
| parser generator | Parsley | Partial Differential Equation LANguage |
| partial equivalence relation | partial function | partially ordered set |
| partial ordering | PARTS | PARULEL |
| Pascal- | Pascal-80 | Pascal+CSP |
| Pascal-F | Pascal-FC | Pascal/L |
| Pascal-Linda | Pascal-m | Pascal P4 |
| Pascal/R | Pascal-S | Pascal-SC |
| pasos2 | Pasqual | PASSIM |
| pastie | patch space | PATCHY |
| pathological | Path Pascal | pattern matching |
| PAW++ | payware | PBM |
| pC++ | PCF | PC-ism |
| PCL | PCLIPS | PC Pursuit |
| PC-Scheme | PCS/Geneva | PCTE+ |
| PC-ware | PDC Prolog | PDEL |
| pdksh | PDL | PDM |
| PDP-11 | PDP-20 | PDSA cycle |
| PDS/MaGen | PeaceNet | Pebble |
| Pebbleman | PECOS | Pedagogic Algorithmic Language |
| PEEK | PEEL | PENCIL |
| pencil and paper | PEPsy | percent |
| perceptron | perfect programmer syndrome | perl-byacc |
| perplexity | person of no account | pessimal |
| pessimising compiler | PEX | phage |
| phase | phase of the moon | phase-wrapping |
| philosophy | PHOCUS | PICL |
| PicTeX | Pictorial Janus | PIE |
| piggybacking | pig, run like a | PIL |
| PIL/I | PILOT | Pilot European Image Processing Archive |
| PIM | Pine | PIRL |
| pistol | PIT | PITA |
| pixmap | pizza box | PL360 |
| PL516 | PL.8 | PLACE |
| PLAGO | plaid screen | PLAIN |
| plain ASCII | Planet | PLANIT |
| PLANNER | Planner-73 | PLANS |
| plants | PLASMA | platform |
| Platform Independent Graphical User Interface | Platon | Playground |
| playpen | pleonasm | Plexus |
| plingnet | PLisp | PL/I SUBSET |
| PL/I Subset G | PLITS | PL/M |
| plokta | PL/P | PL/PROPHET |
| PL/Seq | PLUM | plumbing |
| Plural EuLisp | PLUS | PM |
| P-mail | PML | PNU-Prolog |
| POCAL | POFAC | POGO |
| point of presence | POJO | poke |
| poll | polygon pusher | POM |
| Ponder | POOL | POOL2 |
| POOL-I | POOL-T | POP++ |
| POP-1 | POP-10 | POP-2 |
| POP-9X | POPART | POPCORN |
| POPJ | Poplar | POPLER |
| POPLOG | POPLOG ML | Portable Common Loops |
| Portable Scheme Debugger | Portable Scheme Interpreter | PORTAL |
| porting | Port Language | POSE |
| postcardware | posted write-through | posting |
| postmaster | POSTQUEL | POSYBL |
| POWER | power hit | PowerOpen |
| PowerOpen Association | PPL | PPN |
| PRA | PRE-CC | precedence lossage |
| PREP | Presentation Manager | prestidigitization |
| PRESTO | pretty pictures | prettyprint |
| preventive maintenance | PRI | Primary Rate Interface |
| Primenet, Inc. | prime time | principal type |
| PRINT I | printing discussion | PRISM |
| Privacy Enhanced Mail | privileged instruction | PRL |
| Probe | problem state | PROFILE |
| profile | PROGENY | proglet |
| Program Composition Notation | Program Design Language | Programmers Hierarchical Interactive Graphics System |
| programming | program transformation | PROJECT |
| project assurance | Prolog++ | Prolog-2 |
| Prolog-D-Linda | Prolog-II | Prolog-III |
| Prolog-Linda | Pronunciation | PROOF/L |
| Proposal Writing | proprietary | PROSE |
| ProSet | PROSPER | Prospero |
| protected mode | PROTEUS | protocol |
| Protocol Data Unit | PROTON | Protosynthex |
| Prototyper | prototyping | provably difficult |
| provably unsolvable | provocative maintenance | prowler |
| PSA | PS-ALGOL | pseudoprime |
| PseudoScheme | pseudosuit | pseudo-tty |
| psychedelicware | P-TAC | ptc |
| Ptolemy | PUB | pubic directory |
| public domain | PUFFT | punt |
| Purdue University | pure lambda-calculus | PureLink |
| Pure Lisp | Purify | QA4 |
| qdjanus | QLISP | QLOG |
| Q'NIAL | QT-OBJECTS | Quadrature Amplitude Modulation |
| quadruple bucky | Quake | quality |
| Quantify | quantum bogodynamics | QUEASY |
| Queen Mary and Westfield College | Queen's University | QUEL |
| Quicksort | QUIKSCRIPT | QUIKTRAN |
| QUIN | Quintec-Objects | quintillion |
| quote chapter and verse | quotient | Qu-Prolog |
| Quty | quux | qux |
| QX | R2RS | R3RS |
| R4RS | rabbit job | race condition |
| rain dance | RAL | RAMIS II |
| random | randomness | RAPT |
| raster burn | Ratatosk | rat belt |
| RATEL | rational | rave |
| rave on! | RBASIC | RBCSP |
| RCA 1805 | RCC | rc file |
| RCL | rdb | RDL |
| real hack | real mode | real-time |
| Real-Time Euclid | Real-Time Mentat | real user |
| Real World | reaper | recent changes |
| RECOL | recursive definition | recursive type |
| Red | redex | RediLisp |
| redocumentation | reduction | re-engineering |
| REF-ARF | REFINE | Refined C |
| Refined Fortran | reflexive domain | Reflexive transitive closure |
| regex | regexp | register |
| register dancing | register set | Register Transfer Language |
| REG-SYMBOLIC | REGTRAL | reify |
| RELATIVE | RELCODE | religion of CHI |
| religious issues | RenderMan Shading Language | rendezvous |
| replacement algorithm | Replay | replicator |
| Request For Technology | Required-COBOL | Research Systems, Inc. |
| Resource Access Control Facility | restriction | restructuring |
| retcon | retrocomputing | reuse |
| REX | REXXWARE | RFC 2364 |
| RFE | RGB | rich object |
| Rich Text Format | RIGAL | Rigel |
| Right Thing | RL | rl |
| RLaB | ROADS | Robert T. Morris |
| ROBEX | robust | Rockwell Protocol Interface |
| ROME | root mode | Root Normal Form |
| root version | rot13 | rotary debugger |
| round-trip time | Royal Veterinary and Agricultural University | RPL |
| RPL-1 | RPT | RRS |
| RS-232C | Réseaux Associés pour la Recherche Européenne | Réseaux IP Européens |
| rsh | RTBM | RTC++ |
| RTEE | RTFAQ | RTL/2 |
| RTM | rude | RUFL |
| RUNCIBLE | runes | run-length encoding |
| run time | ruptime | RUTH |
| Rx | Saber-C | Saber-C++ |
| SAC | SAD SAM | SAFARI |
| safe | safety | safety-critical system |
| SAIC | SALEM | salescritter |
| S-ALGOL | SALT | salt |
| salt mines | salt substrate | SAM76 |
| SAMeDL | samurai | sandbender |
| Sandman | Santa Cruz Operation | SASL+LV |
| SASL-YACC | satisfiability problem | SAVE |
| say | SB-Prolog | scag |
| scalability | SCAN | scanf |
| scanner | scanno | scan path |
| SCEPTRE | Scheduling Application Programming Interface | Schema Definition Set |
| Schema Representation language | schematic capture | Schematik |
| Scheme84 | Scheme88 | Scheme-Linda |
| Scheme Object System | Scheme Repository | Schlaer-Mellor |
| Scode | SCOOP | SCOOPS |
| Scorpion | Scott-closed | Scott domain |
| SCRAP | scratch | Scratchpad II |
| scream and die | Screamer | screaming tty |
| screwage | scribble | Scribe |
| SCRIPT | scrog | SCROLL |
| scrool | scrozzle | scuzzy |
| SDE | SDF | SDK |
| SDL | SDL 92 | SDMS |
| SEAL | search-and-destroy mode | secondary damage |
| second generation language | second-system effect | sector interleave |
| sector mapping | Secure Hash Algorithm | SEE |
| seggie | segmentation fault | segv |
| SEI | Seiko RC-4000 | Self-Extensible Language |
| self-reference | SEM | semantic gap |
| semi | semicolon | SENDIT |
| senior bit | SE-ODP | SEPIA |
| Seque | Sequel | sequential file matching |
| Sequential Parlog Machine | SERCOS | Serial Interface Adaptor |
| Serial Line IP | server | set |
| Setext | SETL | SETL2 |
| Set Priority Level | SETS | SEUS |
| SEX | SFBI | SFD-ALGOL |
| SFL | SFLV | SHACO |
| shallow binding | shambolic link | Shape_VC |
| Share and enjoy! | shared memory | shelf |
| shell out | SHIFT | shitogram |
| shotgun debugging | shovelware | Show-And-Tell |
| showstopper | Shub-Internet | SICStus Prolog |
| sidecar | side-effect | Siemens |
| SIFT | Sig | sig block |
| SIGhyper | SIGMA | sig virus |
| SIL | Silage | silly walk |
| silo | Similix | SIML/I |
| SIMPAC | SIMPAS | SIMPL |
| SIMPLE | SIMPL/I | SIMPL-T |
| SIMSCRIPT | SIMSCRIPT I.5 | SIMSCRIPT II.5 |
| simulated annealing | Simulating Digital Systems | Simultaneous Engineering Environment |
| SINA | since time T equals minus infinity | single-attached |
| Single Instruction/Multiple Data | SIPB | SIPLAN |
| Siprol | Siri | SIRTS |
| Skel-ML | Sketchpad | Skill |
| SKOL | skolemisation | S-K reduction machine |
| SKsh | SL5 | SLANG |
| slap on the side | slave tty | SLIM |
| SLIP | SLIPS | Sloop |
| slopsucker | slurp | SMALGOL |
| SMALL | Small-C | small-office/home-office |
| Smalltalk/V | SMART | smart card |
| SMCC | SMG | SML |
| SML# | sml2c | SMNP |
| smoke | smoke and mirrors | smoke test |
| smoking clover | SMoLCS | SMOP |
| SNAFU principle | snarf | snarf & barf |
| snarf down | snark | sneakernet |
| Sniff | SNOBOL2 | SNOBOL3 |
| SNOOPS | SO 2 | SOAR |
| social science number | SOCRATIC | SODAS |
| SoftBench | softcopy | SoftModem |
| Software bus | Software Engineering Environment | software interrupt |
| software laser | software reliability | softwarily |
| softy | SOHIO | Solid State Disk |
| SOLO | Solution Based Modelling | Solve |
| SOM | SOS | sound card |
| soundness | SP | SP2 |
| SP/2 | space-cadet keyboard | space leak |
| SPADE | SPAR | sparse |
| SPDL | Speakeasy | Spec |
| SPECbase_fp92 | SPECbase_int92 | SPECbaserate |
| special-case | Special Interest Group | specialisation |
| specific markup | SPECOL | speech synthesis |
| SPEED | SPEEDEX | speedometer |
| SPG | SPID | spiffy |
| SPIT | SPITBOL | SPL |
| SPLash! | splat | SPL/I |
| SPLINTER | Split-C | spoiler |
| spoo | spoofing | spooge |
| spool file | SPRINT | Sprintnet |
| SPS | SPUR | SQE |
| SQL/DS | SQL Module Language | SRC Modula-3 |
| SRDL | SRL | SRP |
| SSADM | STAB-11 | Stack Environment Control Dump machine |
| stack puke | STAGE2 | Standard for the exchange of product model data |
| Standard Instrument Control Library | Standard Lisp | Standard ML of New Jersey |
| standard semantics | Stanford Research Institute | STAR 0 |
| StarBurst | Starset | stateless |
| state transition diagram | STD | STD 15 |
| STD 9 | STDWIN | steam-powered |
| Steelman | STENSOR | stereogram |
| STIL | STING | STMP |
| stomp on | STONE | stone knives and bearskins |
| Stoneman | stop bit | stoppage |
| STP4 | Strand | Strand88 |
| Strawman | STREAM | strength reduction |
| STRESS | strict | strict evaluation |
| strided | string reduction | stroke |
| strongly connected component | structural recursion | structured analysis |
| Structure of Management Information | STRUDL | STSC APL |
| stub network | stubroutine | STUDENT |
| studly | Stupids | stupid-sort |
| Sturgeon's Law | subband encoding | subnet |
| subnet address | Subset-Equational Language | SuccessoR |
| sucking mud | Sue | SUGAR |
| SUIF | suit | SUMMER |
| SUMMER SESSION | sunspots | sun-stools |
| SunView | SUPER | supercompilation |
| SuperJanet | SUPERMAC | superpipelined |
| superprogrammer | super source quench | SuperTalk |
| superuser | supervisor mode | Sure |
| surfing | SURGE | suspension |
| Suzie COBOL | SVR4 | swab |
| SweetLambda | swizzle | SYDEL |
| SYGMA | syllogism | Sylvan |
| SYMBAL | SYMBOLANG | symbolic inference |
| Symbol Manipulation Program | Symmetric LISP | syntactic salt |
| syntactic sugar | syntax directed translation | Synthesizer Specification Language |
| sysape | sys-frog | SYSLISP |
| system | System V | System V Interface Definition |
| T | TABLET | TAC |
| TACL | tail-strict | TALE |
| Taligent | TANSTAAFL | tape |
| Target-Machine Description Language | TARTAN | TASM |
| TASS | taste | Taxis |
| Tbl | TC/IX | tcl-debug |
| Tcl-DP | Tcode | TCOL |
| TCOL.Ada | TCPIP | TDFL |
| Technical/Office Protocol | TechRef | telecommuting |
| telematics | TelEnet | Telescript |
| TeleUSE | TELNET | TELOS |
| TELSIM | TEMPLOG | TEMPO |
| Tempura | ten-finger interface | tense |
| TERMAC | terminak | terminal brain death |
| terminal emulation | terminal junkie | terminal server |
| Terminate and Stay Resident | termination analysis | term rewriting system |
| terpri | Terse | TET |
| Texinfo | text | T-gen |
| TGS-II | That's not a bug, that's a feature! | The Cuckoo's Egg |
| The Force | The Internet Account | THEO |
| theology | theory | The World Of Cryton |
| the X that can be Y is not the true X | ThingLab | Think C |
| thrash | thread | thud |
| tick | TickIT | tickle a bug |
| tick-list features | tiger team | timeout |
| time sink | time T | Time to Live |
| time zone | tinman+ | TINT |
| Tiny | Tiny Clos | TIP |
| TIPL | tip of the ice-cube | tired iron |
| TK!Solver | TL1 | TM |
| TMG | TMRC | TMRCie |
| tn3270 | TNXE6 | to a first approximation |
| toggle | TOK | token ring |
| toolsmith | TOPS-10 | tourist information |
| Tower Technology Corporation | toy | toy problem |
| TPL | TPS | tptc |
| Trafola-H | trampoline | TRANDIR |
| TRANQUIL | TRANS | transaction |
| transducer | Transistor-Transistor Logic | transitive |
| transitive closure | transit network | trap |
| trap door | trash | Trash-80 |
| trawl | TREET | TREETRAN |
| Trellis | Trellis Code Modulation | TRIGMAN |
| TROLL | troll | Trumpet |
| TS | TSEE | TSL-1 |
| TUB | tube time | Tuckals |
| Tuki | tunneling | Tuple Space Smalltalk |
| tupling | Turbo Prolog | Turing |
| Turing Plus | Turing tar-pit | turist |
| TUTOR | tweak | Twentel |
| TWIG | twilight zone | twink |
| twm | twonkie | two-to-the-N |
| TX-0 | type class | type scheme |
| typographical error | UAN | UBASIC |
| ubiquitous computing | uC++ | U-Code |
| uemacs | UHELP | UIMS |
| UIMX | UMB | UMB Scheme |
| UNCOL | undefined external reference | under the hood |
| U-NET Limited | unfold/fold | unicos |
| unifier | UNIFORM | Uniform Resource Number |
| UNISAP | United Technologies Research Cente | UNITY |
| Unix brain damage | Unix conspiracy | unproto |
| unshar | unswizzle | unwind-protect |
| unwind the stack | upgrade | upload |
| UPMAIL Tricia Prolog | upper bound | UPS |
| upthread | Uranus | URC |
| URouLette | user experience | user-friendly |
| user interface | user interface copyright | USG Unix |
| USL | usr | USSA |
| UUCPNET | uudecode | UUPC |
| V | V.32ter | Valid |
| validation | vanilla | VAR |
| VAX DOCUMENT | VAXen | vaxherd |
| vaxism | vaxocentrism | VAXset |
| VAXstation | VCODE | vdiff |
| VDM | VDM++ | Verdi |
| verification | VGQF | VHDL |
| VHLL | video conference | videotex |
| Vienna Definition Language | Vienna Fortran | Views |
| VIF | Viola | virgin |
| Viron | virtual cache | Virtual Control Program Interface |
| Virtual Device Location | Virtual Home Environment | virtual machine |
| virtual point of presence | virtual shredder | Virtual Telecommunications Access Method |
| visionary | Visual C++ | visual programming |
| visual programming environment | VITAL | VIVID |
| viz | VLDB | VMEbus |
| VML | voice-net | VPL |
| VRTX | VSP | VSX |
| VTS | VUE | VUIT |
| W3 | WA-12 | wabbit |
| wacco | WAFL | WAITS |
| waldo | wallpaper | wall time |
| WAM | wango | wank |
| wannabee | Warm Silence Software | wart |
| Wasserman | WATBOL | WATFIV |
| WATFOR | WCL | WE |
| Webster | Webster's Dictionary | wedged |
| wedgie | wedgitude | Weeble |
| weeds | weenie | Weenix |
| well-behaved | well-connected | WFL |
| whack | whacker | whalesong |
| What's a spline? | wheel | wheel bit |
| wheel wars | White pages | whois |
| WIBNI | widget | wiggles |
| Wild_LIFE | window system | Wisp |
| wizard | wizardly | WizDOM |
| WOMBAT | Woodenman | WOOL |
| Worcester Polytechnic Institute | WPL+ | WPOP |
| wrap around | write-only code | write-only language |
| WRT | WSL | WTF |
| WTH | X11R4 | X11R5 |
| X.28 | X.29 | X.3 |
| X3J16 | X.75 | XA |
| Xaw | Xbase | xbeeb |
| XC | X client | X Consortium |
| Xcoral | X.desktop | XEROX PARC |
| Xfun | Xi | X Image Extension |
| Xlib | XMODEM-1K | xnf2ver |
| XNS | X/open Portability Guide | XPC |
| XperCASE | XPG3 | XPL |
| xref | XRemote | XRN |
| Xt | XTRAN | XUI |
| Xv++ | XView | XVT |
| XWIP | xxgdb | XXX |
| Y | Yaa | YABA |
| YAPS | YAUN | Yellow |
| Yellow Book CD-ROM | yellow wire | YLISP |
| YMODEM | YMODEM-G | You are not expected to understand this |
| YP | Yu-Shiang Whole Fish | ZAPP |
| ZEBRA | Zed | Zen |
| ZENO | ZEST | zigamorph |
| Zilog Z280 | zone | zorch |
| Z shell | ZUG | ZyXEL |
| {log} | | |
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