| 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 | Boehm B. |
| BOF | bogon | bogon filter |
| bogon flux | bogosity | bogue out |
| boink | bondage-and-discipline language | bonk/oif |
| Bookreader | Bookviewer | Booster |
| BOOTP | boot virus | 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 | 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 | CDL |
| cd tilde | Cecil | Cedar |
| CEEMAC+ | CEI-PACT | Cellang |
| 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 | 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 | 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 | Empty Nest | emulator |
| EMX | Encapsulated PostScript | encapsulation |
| Enhanced Dynamic Random Access Memory | 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 | eXternal Data Representation |
| EXTRA | EZ | f2c |
| F68K | FAC | factor |
| FAD | failure | 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 | hierarchy | high bit |
| Higher Education National Software Archive | 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 |
| 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. | 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 | 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 | 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 |
| 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 | 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 |
| 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 | 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 Distributed System Architecture | Open Network Computing |
| Open Scripting Architecture | Open Search | open switch |
| OPS83 | Optical Time Domain Reflectometry | optimise |
| optimism | OPTRAN | Oracle*CASE |
| Orbit | Orca | 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 |
| 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 | 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 |
| 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 | 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 |
| 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 | sequence |
| sequential file matching | Sequential Parlog Machine | SERCOS |
| Serial Interface Adaptor | Serial Line IP | server |
| set | Setext | SETL |
| SETL2 | Set Priority Level | 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 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 |
| 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 | wiggles |
| Wild_LIFE | Wisp | wizard |
| wizardly | WizDOM | WOMBAT |
| Woodenman | WOOL | Worcester Polytechnic Institute |
| 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 | 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} |
