| 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 |
| 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 | 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 | 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 |
| 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} |
