| IVS | Interface Verification Summary | In English | → Human-computer interaction |
| IVT | Interface Verification Test | In English | → Human-computer interaction |
| IWCE | International Workshop on Computational Electronics | In English | → Electronics |
| IWFHR | International Workshop on Frontiers in Handwriting Recognition | In English | → Congresses → Writing systems → Document processing |
| IWG | Interface Working Group | In English | → Human-computer interaction |
| J2EE | Java 2 Enterprise Edition | In English | → Programming languages |
| J2ME | Java 2 Micro Edition | In French | → Programming languages |
| JAAS | Java Authentication and Authorization Service | In English | → Programming languages |
| JABS | Just Another Blog on Sports | In English | → Networks, communication → Sport, physical exercises |
| JAlgo | Journal of Algorithms | In English | → Serial publications, periodicals → 5105 |
| JASIS | Journal of the American Society for Information Science and Technology | In English | → Serial publications, periodicals |
| JBIG | Joint Bi-level Image Group | In English | → Graphical processing → Image processing |
| JBIG | Joint Bi-level Image Experts Group | In English | → Graphical processing → Image processing |
| JCA | Journal of Computational Acoustics | In English | → Serial publications, periodicals → Acoustics |
| JCAMD | Journal of Computer-Aided Materials Design | In English | → Serial publications, periodicals → Graphical processing → 620 |
| JCM | Journal of Computational Mathematics | In English | → Serial publications, periodicals → Mathematics |
| JCoAM | Journal of Computational and Applied Mathematics | In English | → Serial publications, periodicals → Mathematics |
| JCoB | Journal of Computational Biology | In English | → Serial publications, periodicals → Biological sciences |
| JCoCh | Journal of Computational Chemistry | In English | → Serial publications, periodicals → Chemistry |
| JCoN | Journal of Computational Neuroscience | In English | → Serial publications, periodicals → Biological sciences → Neurology |
| JCoPh | Journal of Computational Physics | In English | → Serial publications, periodicals → Physics |
| JCoSS | Journal of Computer and System Sciences | In English | → Serial publications, periodicals |
| JCP | Java Community Process | In English | → Programming languages |
| JCSC | Journal of Circuits, Systems and Computers | In English | → Serial publications, periodicals → Software |
| JDBC | Java DataBase Connectivity | In English | → Software → Data |
| JDE | Java Development Environment | In English | → Programming languages |
| JEA | Journal of Experimental Algorithmics | In English | → Serial publications, periodicals → Mathematics |
| JEP | Java Math Expression Parser (www.singularsys.com/jep/) | In English | → Software → Mathematics |
| JHSN | Journal of High Speed Networks | In English | → Serial publications, periodicals → Networks, communication → Telecommunications |
| JIRS | Journal of Intelligent and Robotic Systems | In English | → Serial publications, periodicals → Artificial intelligence → Electronics |
| JME | Java Monkey Engine | In English | → Software |
| JME | JME Molecular Editor | In English | → Software → Chemistry |
| JMIV | Journal of Mathematical Imaging and Vision | In English | → Serial publications, periodicals → Mathematics → Computer-based techniques |
| JMRP | Junk E-Mail Reporting Program | In English | → Networks, communication |
| JNEng | Journal of Neural Engineering | In English | → Serial publications, periodicals → Artificial intelligence |
| JoDI | Journal of Digital Information | In English | → Serial publications, periodicals → Data |
| JPDC | Journal of Parallel and Distributed Computing | In English | → Serial publications, periodicals |
| JPEG | Joint Photographic Experts Group | In English | → Organizations and associations → Graphical processing → Image processing |
| JPEO | Javascript Percent Encoding Obfuscator | In English | |
| JSCom | Journal of Scientific Computing | In English | → Serial publications, periodicals |
| JSCS | Journal of Statistical Computation and Simulation | In English | → Serial publications, periodicals → Mathematics |
| JSGF | Java Speech API Grammar Format | In English | → Software |
| JSON | JavaScript Object Notation | In English | → Software |
| JSR | Java Specification Request | In English | → Programming languages |
| JSymC | Journal of Symbolic Computation | In English | → Serial publications, periodicals → Mathematics |
| JTIDS | Joint Tactical Integrated Display System | In English | → Human-computer interaction |
| JUS | Journal for Usability Studies | In English | → Serial publications, periodicals → Human-computer interaction |
| JVM | Java Virtual Machine | In English | → Programming languages |
| KB | Keyboard | In English | → Hardware → Human-computer interaction |
| KBIM | Keyboard Interface Module | In English | → Human-computer interaction |
| KBS | Knowledge-Based System | In English | → Software |
| KBSA | Knowledge-Based Software Assistant | In English | → Software → Knowledge management |
| KBT | Komputada Baza Terminaro | In Esperanto | → Dictionaries |
| KBU | Keyboard Unit | In English | → Hardware → Human-computer interaction |
| KCCA | Knowledge Content Carrier Architecture | In English | → Data |
| KCO | Knowledge Content Object | In English | → Software → Data |
| KCOs | Knowledge Content Objects | In English | → Data |
| KCRT | Keyboard Cathode-Ray Tube | In English | → Hardware |
| KCS | Key(board) Configuration Study | In English | → Human-computer interaction |
| KDMS | Kennedy Data Management System | In English | → Knowledge management → Data |
| KDS | Kennedy-Developed Software | In English | → Software → Spaceflight engineering, astronautics |
| KDT | Keyboard and Display Test | In English | → Human-computer interaction |
| KEPAF | Képfeldolgozók és Alakfelismerők Társasága | In Hungarian | → Organizations and associations → Graphical processing → Image processing |
| KI | Kunstmatige Intelligentie = AI | Artificial Intelligence | In English = AI | Artificiële Intelligentie | In Dutch = VI | Vještačka inteligencija | In Bosnian = IA | Intelligència artificial | In Catalan = KI | Künstliche Intelligenz | In German = AI | Artefarita Inteligenteco | In Esperanto = IA | Intelligence Artificielle | In French |
In Dutch | → Artificial intelligence |
| KI | Künstliche Intelligenz = AI, VI, IA (look above) |
In German | → Artificial intelligence |
| KIP | Keyboard Input Processor | In English | → Hardware → Human-computer interaction |
| KKV | Kvinlingva Komputilteĥnika Vortaro | In Esperanto | → Dictionaries |
| KL | Komputika Leksikono | In Esperanto | → Dictionaries |
| KLM | Keyboard Layout Manager | In English | → Operating systems |
| KML | Keyhole Markup Language | In French | → Programming languages |
| KR | Keyboards Recording (www.keyboardsrecording.fr) | In English | → Music |
| KU | Keyboard Unit | In English | → Hardware → Human-computer interaction |
| LAD | Lecture Automatique de Documents | In French | → Document processing |
| LADL | Laboratoire d'Automatisme Documentaire et Linguistique | In French | → Research institutes → Libraries → Linguistics |
| LAFORIA | LAboratoire FORmes et Intelligence Artificielle | In French | → Research institutes → Artificial intelligence |
| LAI | Logistics Artificial Intelligence | In English | → Artificial intelligence → Maintenance and logistics |
| LAMP | Linux, Apache, MySQL, PHP | In English | → Software → Networks, communication |
| LAMSADE | Laboratoire d'Analyse et de Modélisation de Systèmes pour l'Aide à la DÉcision | In French | → Research institutes → Computer-based techniques → Management |
| LAN | Local Area Network | In English | → Networks, communication → Telecommunications |
| LANES | LAN (Local Area Network) Extensible Simulator | In English | → Networks, communication |
| LBD | Laboratoire de Bases de Données | In French | → Research institutes → Data |
| LBM | Load Buffer Memory | In English | → Memories |
| LBR | Low Bit Rate | In English | |
| LCB | Least Common Bit | In English | |
| LCD | Liquid Crystal Display | In English | → Human-computer interaction → Electronics |
| LCD | Light Crystal Display | In English | → Human-computer interaction |
| LDAP | Lightweight Directory Access Protocol | In English | → Networks, communication |
| LDB | Logistics Data Bank | In English | → Data → Maintenance and logistics |
| LDD | Logical Data Base Design | In English | → Data |
| LDD | Langage de Description de Données | In French | → Data |
| LDIU | Launch Data Interface Unit | In English | → Human-computer interaction → Spaceflight engineering, astronautics |
| LDP | Local Data Package | In English | → Data |
| LDR | Low Data Rate | In English | → Data |
| LETI | Laboratoire d'Électronique et de Technologie de l'Informatique | In French | → Research institutes → Electronics |
| LIA | Laboratoire d'Informatique d'Avignon (www.lia.univ-avignon.fr) | In French | → Research institutes |
| LIDIC | Liaisons Informatiques entre Distributeurs et Constructeurs | In French | |
| LIG | Laboratoire d'Informatique de Grenoble | In French | → Research institutes |
| LII | Librarians' Internet Index | In English | → Libraries → Networks, communication |
| LiLoLiPo | Linux et les Logiciels Libres à Pont-Château | In French | → Organizations and associations → Software → Operating systems |
| LIMBER | Language Independent Metadata Browsing of European Resources | In English | → Libraries |
| LIMSI | Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur | In French | → Research institutes → Mechanical engineering |
| LinAC | Linux Angoulême Charente | In French | → Operating systems |
| LINC | Logic and Information Network Compiler | In English | |
| LIP6 | Laboratoire d'Informatique de Paris 6 | In French | → Research institutes |
| LIRIS | Laboratoire d'InfoRmatique en Images et Systèmes d'information | In French | → Research institutes → Graphical processing → 00 |
| LIRMM | Laboratoire d’Informatique, de Robotique et de Micro-électronique de Montpellier | In French | → Research institutes → Electronics |
| LIS | Landinformationssystem | In German | → Software → Geography |
| LISP | LISt Processing | In English | → Programming languages |
| LIU | Line Interface Unit | In English | → Human-computer interaction |
| LKD | Linux Kullanıcıları Derneği | In Turkish | → Operating systems |
| LKM | Loadable Kernel Modules | In English | |
| LLCF | Launch and Landing Computational Facility | In English | → Spaceflight engineering, astronautics |
| LLCSC | Low-Level Computer Software Component | In English | → Software |
| LLI | Laboratoire de Linguistique Informatique | In French | → Research institutes → Computer-based techniques → Linguistics |
| LMD | Langage de Manipulation de Données | In French | → Data |
| LMDS | Logistics Management Data System | In English | → Data → Maintenance and logistics |
| LMO | Liga Manager Online | In English | → Software → Sport, physical exercises |
| LMO | Langages et Modèles à Objets | In French | → Programming languages |
| LNCC | Lecture Notes in Computer Science | In English | → Libraries |
| LNCS | Lecture Notes in Computer Science | In English | → Serial publications, periodicals |
| LOC | Lines Of Code | In English | → Software |
| LOCI | Laboratory for Optical and Computational Instrumentation | In English | → Research institutes → Optics |
| LOLICA | LOgiciels LIbres en région Champagne-Ardenne | In French | → Programming languages |
| LOLICA | Logiciels Libres en Champagne-Ardenne | In French | → Organizations and associations → Software |
| LoLiTa | Logiciels Libres à Tahiti et ses îles | In French | → Organizations and associations → Software |
| LONS | Local On-Line Network System | In English | → Networks, communication |
| LPIC | Ligue de Protection des Internautes Câblés | In French | → Internet → Organizations and associations → Consumerism → Telecommunications |
| LRI | Laboratoire de Recherche en Informatique | In French | → Research institutes |
| LSA | Latent Semantic Analysis | In French | → Computer-based techniques → Semiotics |
| LSB | Least Significant Bit | In English | → Software |
| LSD | Low-Speed Data | In English | → Data |
| LSI | Latent Semantic Indexing | In English | → Computer-based techniques → Semiotics |
| LTHIS | Laboratory Test Hardware Inventory Status | In English | → Hardware |
| LTL | Linear Temporal Logic | In English | → Software → Mathematics |
| LUG | Linux Users' Groups = GUL | Groupes d'Utilisateurs de Linux | In French |
In English | → Organizations and associations → Operating systems |
| LUGOAL | Linux User Group Of ALgeria | In English | → Organizations and associations → Operating systems |
| LUSSI | Logique des Usages, Sciences Sociales et sciences de l'Information | In French | → Sociology → Telecommunications |
| LVCSR | Large Vocabulary Speech Recognition | In English | → Computer-based techniques → Linguistics |
| LVDC | Launch Vehicle Digital Computer | In English | → Hardware → Vehicle engineering |
| LVS | Linux Virtual Server | In English | → Operating systems → Networks, communication |
| LVT | LPAR Validation Tool | In English | → Software |
| MAB | Mozilla Amazon Browser | In English | → Software |
| MAC | Multiaccess Computer | In English | → Hardware |
| MAC | Media Access Control | In English | → Networks, communication → Telecommunications |
| MACDS | Monitor And Control Display System | In English | → Human-computer interaction |
| MaCom | Mathematics of Computation | In English | → Serial publications, periodicals → Mathematics |
| MACRO | Merge And Correlate Recorded Output | In English | → Data → 00592 |
| MACSI | Modélisation, Analyse et Conduite des Systèmes Industriels | In French | → Computer-based techniques → Engineering, technology |
| MACSI | Mathematics, Computing and Simulation for Industry | In English | → Mathematics → Computer simulation |
| MACSI | Master d'Audit et Conseil des Systèmes d'Information | In French | → Higher education, universities |
| MACVNR | Mexican Association for Computer Vision, Neurocomputing and Robotics | In English | → Associations → Computer-based techniques → Artificial intelligence → Applied sciences, technology |
| MADC | Multiplexer Analog-To-Digital Converter | In English | → Hardware |
| MADRE | Manufacturing Data Retrieval | In English | → Data → Engineering, technology |
| MADS | Modular Auxiliary Data System | In English | → Data |
| MAID | Massive Array of Idle Disks | In English | → Hardware |
| MAIDS | Management Automated Information Display System | In English | → Human-computer interaction → Management |
| MAM | Media Asset Management | In English | → Computer-based techniques → Knowledge management |
| MAMP | My Arbitrary Precision Math (Library) | In English | → Software → Mathematics |
| MAR | Memory Address Register | In English | → Memories |
| MARION | Méthode d'Analyse de Risques Informatiques Optimisée par Niveau | In French | |
| MARSOUIN | Môle Armoricain de Recherche sur la SOciété de l'Information et les Usages d 'Internet | In French | → Networks, communication → Telecommunications |
| MASCOTTE | Méthodes Algorithmiques, Simulation, Combinatoire et OpTimisation pour les TElécommunications | In French | → Telecommunications |
| MASS | Mathematical Acceleration Subsystem | In English | → Programming languages → Mathematics |
| MathML | Mathematical Markup Language | In English | → Programming languages → Data → Mathematics |
| MBC | Meaning Based Computing | In English | → Document processing |
| MBI | Multibus Interface | In English | |
| MBM | Magnetic Bubble Memory | In English | → Memories |
| MBPS | Main Bus Power Supply | In English | → Hardware |
| MBS/IP | Multi-purpose Business Security over Internet Protocol | In English | → Internet |
| MBSU | Main Bus Switching Unit | In English | → Hardware |
| MC | Memory Configuration | In English | → Memories |
| MC/EC | Mission-Critical/Embedded Computer | In English | → Hardware |
| MCA | Main Console Assembly | In English | → Hardware |
| MCAE | Mechanical Computer Aided Engineering | In English | → Computer-based techniques → Mechanical engineering |
| MCC | Main Control Console | In English | → Human-computer interaction |
| MCC | Manchester Computing Center | In English | |
| MCCC | Mission Control and Computing Center | In English | |
| MCCR | Mission-Critical Computer Resource | In English | → Hardware |
| MCCS | Mission-Critical Computer System | In English | → Hardware |
| MCDS | Maintenance Control and Display System | In English | → Human-computer interaction → Maintenance and logistics |
| MCDS | Management Communication and Data System | In English | → Data → Management |
| MCDS | Malfunction CRT Display System | In English | → Human-computer interaction |
| MCDS | Multifunction CRT Display System | In English | → Human-computer interaction |
| MCDU | Multifunction CRT Display Unit | In English | → Human-computer interaction |
| MCF | Military Computer Family | In English | → Hardware → Military engineering |
| MCH | Memory Controller Hub | In English | → Hardware → Networks, communication |
| MCH | Micro Channel Hardware | In English | → Hardware |
| MCIU | Manipulator Controller Interface Unit | In English | → Human-computer interaction |
| MCIU | Master Controller Interface Unit | In English | → Human-computer interaction |
| MCIU | Mission Control and Interface Unit | In English | → Human-computer interaction |
| MCM | Multichip Module | In English | → Hardware |
| MCMS | Microsoft Content Management Server | In English | → Software |
| MComM | Mathematical and Computer Modelling | In English | → Computer simulation → Serial publications, periodicals → Mathematics |
| MComP | Methods in Computational Physics | In English | → Serial publications, periodicals → Physics |
| MCP | Master Computer Program | In English | → Software |
| MCTI | Ministerul Comunicaţiilor şi Tehnologiei Informaţiei | In Romanian | → Central administration → Telecommunications |
| MDA | Model Driven Architecture | In English | → Software |
| MDAS | Mission Data Acquisition System | In English | → Data |
| MDAS | Meteorological Data Acquisition System | In English | → Data → Meteorology, climatology |
| MDB | Main Memory Data Output Bus | In English | → Memories |