| .Gertrude | 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 |
| BLOX | BLT | Blue |
| blue wire | blurgle | BMASF |
| BNF | BNR Pascal | BNR Prolog |
| boa | board | boat anchor |
| Bob | Boehm B. | 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 | 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 |
| 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 | 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 |
| CORAL | 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 | European Committee for Standardization | 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 |
| 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 |
| 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 | phone phreaking |
| phreak | 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 |
| PseudoScheme | pseudosuit | psychedelicware |
| P-TAC | ptc | Ptolemy |
| public 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 | Sci-Hub | 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 adapter |
| 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 |
| stalker_portal/c/version.js | 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 | 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} | |
