| bamf | 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 |
| 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 | 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 | 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 | 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 | 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 | 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} | |
