| FICAM | Fédération des Industries du Cinéma, de l’Audiovisuel et du Multimédia (www.ficam.fr) | In French | → Organizations and associations → Cinema, movies |
| FicML | Fiction Markup Language | In English | → Programming languages → Literature |
| FLAPS | Flight Application Software | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FLOSS | Free/Libre Open Source Software | In English | |
| FOAF | Friend of a Friend | In English | → Programming languages → Networks, communication |
| FODM | Field Operations Data Model | In English | |
| FORTRAN | Formula Translation | In English | → Programming languages |
| FSE | Fast Software Encryption | In English | → Mathematics → Telecommunications |
| FSF | Free Software Foundation | In English | → Foundations |
| FSI | Flight Software Integration | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSRR | Flight Software Readiness Review | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSSR | Flight System Software Requirements | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSSR | Functional Subsystem Software Requirements | In English | |
| FSSR | Flight System Software Request | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSUGAr | Free Software Users Group Arlon | In English | → Organizations and associations |
| FSW | Flight Software | In English | → Spaceflight engineering, astronautics |
| FTAM | File Transfer Access and Management | In English | → Networks, communication |
| FTP | Functional Test Program | In English | |
| G3L | Groupe pour la promotion de GNU/Linux et des Logiciels Libres | In French | → Organizations and associations → Operating systems |
| GAMS | Guide to Available Mathematical Software | In English | → Mathematics |
| GBS | Ground-Based Software | In English | |
| GCOS | Ground Computer Operating System | In English | → Operating systems |
| GELLMU | Generalized Extensible LaTeX-Like MarkUp | In English | → Programming languages → Data |
| GFS | Government-Furnished Software | In English | → Central administration |
| GIOP | General Inter-ORB Protocol | In English | |
| GIRLS | Generalized Information Retrieval Language System | In English | → Data → Operating systems |
| GIS | Geografiskt InformationsSystem = GIS | Geographic(al) Information System | In English = SIG | Sistema Informativo Geografico | In Italian = SIG | Sistema de Información Geográfica | In Spanish = SIG | Sistema d'informació geogràfica | In Catalan = GIS | Geografický Informační Systém | In Czech = ГИС | Географска информационна система | In Bulgarian = ΓΣΠ | Γεωγραφικά Συστήματα Πληροφοριών | In Greek = GIS | Geographisches Informationssystem | In German = GIS | Geoinformationssystem | In German = GIS | Geoinfosüsteem | In Estonian = GIS | Geografski informacijski sustav | In Croatian = ממ"ג | מערכת מידע גאוגרפית | In Hebrew = GIS | Geografinė informacinė sistema | In Lithuanian = SIG | Sistem Informasi Geografis | In Indonesian = GIS | Geografisch Informatiesysteem | In Dutch = GIS | Geografiske informasjonssystem | In Nynorsk = GIS | Geografiske informasjonssystemer | In Norwegian = SIG | Sistema de informação geográfica | In Portuguese = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = ГІС | Геоінформаційна система | In Ukrainian |
In Swedish | → Geography |
| GIS | Geographisches Informationssystem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In German | → Geography |
| GIS | Geografinė informacinė sistema = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Lithuanian | → Geography |
| GIS | Geografiske informasjonssystemer = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Norwegian | → Geography |
| GIS | Geoinfosüsteem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Estonian | → Geography |
| GIS | Geografický Informační Systém = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Czech | → Geography |
| GIS | Geografski informacijski sistem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Slovenian | → Geography |
| GIS | Geographic(al) Information System = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In English | → Geography |
| GIS | Geografisch Informatiesysteem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Dutch | → Geography |
| GIS | Geografski informacijski sustav = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Croatian | → Geography |
| GIS | Geoinformationssystem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In German | → Geography |
| GIS | Geografiske informasjonssystem = SIG, ГИС, ΓΣΠ, ממ"ג, ГІС (look above) |
In Nynorsk | → Geography |
| GKS | Graphics Kernel System | In English | |
| GKS | Graphical Kernel System | In English | → Operating systems |
| GLP | GOAL Language Processor | In English | |
| GML | Geography Markup Language | In English | → Programming languages → Geography |
| GMULL | Groupe Mareuillais d'Utilisateurs de Logiciels Libres | In French | |
| GNOME | GNU Network Object Model Environment | In English | |
| GNU | GNU's Not Unix | In English | |
| GOLD | General Ontology for Linguistic Description | In English | → Programming languages → Linguistics |
| GOSCON | Government Open Source Conference | In English | → Congresses |
| GPL | Groupe des Pingouins Libres | In French | → Organizations and associations → Operating systems |
| GPL | GOAL Processing Language | In English | → Programming languages → Spaceflight engineering, astronautics |
| GPRN | GOAL Test Procedure Release Notice | In English | → Programming languages → Spaceflight engineering, astronautics |
| GPSCP | GPS (Global Positioning System) Computer Program | In English | → Geodesy, cartography → Spaceflight engineering, astronautics |
| GPUR | GOAL Test Procedure Update Request | In English | → Programming languages → Spaceflight engineering, astronautics |
| GRAL | Groupement Réunionnais des Amis de Linux | In French | → Organizations and associations → Operating systems |
| GrUB | Groupe d'utilisateurs borains | In French | → Organizations and associations → Operating systems |
| GSAS | Government Selected Application Systems | In English | |
| GSDL | Ground Software Development Laboratory | In English | → Research institutes |
| GSPF | Ground Software Production Facility | In English | |
| GSS | Ground Support Software | In English | |
| GU4L | Groupe des Utilisateurs de Logiciels Libres Léo Lagrange | In French | → Organizations and associations |
| GUL | Groupes d'Utilisateurs de Linux = LUG | Linux Users' Groups | In English |
In French | → Organizations and associations → Operating systems |
| GULAT | Groupe d'utilisateur de Linux de l'Abitibi-Témiscamingue | In French | → Organizations and associations → Operating systems |
| GULG | Groupe des Utilisateurs du Libre en Guyane | In French | → Organizations and associations |
| GULiDef | Groupe des Utilisateurs de Linux dans la Défense | In French | → Organizations and associations → Operating systems → Military engineering |
| GULLH | Groupe des Utilisateurs de Logiciels Libres au Havre | In French | → Organizations and associations |
| GULLIVER | Groupe des Utilisateurs de Linux et des Logiciels libres d'Ille et Vilaine et Environs de Rennes | In French | → Operating systems |
| GuLSE | Groupe des Utilisateurs Linux de Saint-Eustache et des environs | In French | → Organizations and associations → Operating systems |
| GULUQ | Groupe d'Utilisateurs Linux de l'Université du Québec | In French | → Organizations and associations → Operating systems |
| GULUS | Groupe d'utilisateurs de Linux de l'Université de Sherbrooke | In French | → Organizations and associations → Operating systems |
| GUM | Generalized Upper Model | In English | → Programming languages |
| GUML | Groupement des Utilisateurs Mauriciens de Linux | In French | → Organizations and associations → Operating systems |
| GWT | Google Widget Toolkit | In English | → Networks, communication |
| HAL | High-order Assembly Language | In English | → Programming languages |
| HAL | Houston Aerospace Language | In English | → Programming languages |
| HALS | High-order Programming Language for Spacelab usage | In English | → Programming languages |
| HDM | Hard Disk Manager | In English | → Memories |
| HLAL | High-Level Assembler Language | In English | → Programming languages |
| HLTL | High-Level Test Language | In English | → Programming languages |
| HOL | High-Order Language | In English | → Programming languages |
| HOLC | High-Order Language Computer | In English | → Hardware → Programming languages |
| HOS | Hybrid Operating System | In English | → Operating systems |
| HOS | High-Order Software | In English | |
| HR-XML | Human Resources eXtensible Markup Language | In English | → Programming languages → Personnel management → Labour, labour economics |
| HSC | Hardware and Software Coordination | In English | → Hardware |
| HSL | Haifa Software Lab | In English | |
| HTA | HTML Applications | In English | |
| HTLL | High-Test-Level Language | In English | → Programming languages |
| HTML | HyperText Markup Language | In English | → Programming languages → Data |
| IASSP | IEEE (Institute of Electrical and Electronics Engineers) ASSP Magazine | In English | → Serial publications, periodicals |
| ICOS | Integrated Cargo Operating Software | In English | → Transport and postal services |
| ID | Informatique Distribuée | In French | → Networks, communication |
| IDBMS | Integrated Data Base Management System | In English | → Data |
| IDE | Interactive Development Environment | In English | → 6585 |
| IDL | Interface Description Language | In English | → Programming languages → Human-computer interaction |
| IDOS | Integrated Display Operating System | In English | → Operating systems |
| IGDA | International Game Developers Association (www.igda.org) | In English | → Associations → Entertainment |
| IHSR | Integrated Hardware/Software Review | In English | → Hardware |
| IIOP | Internet Inter Orb Protocol | In English | → Networks, communication |
| ILS | Integrated Library System = SIGB | Système Intégré de Gestion de Bibliothèque | In French = АБИС | Автоматизированные библиотечные информационные системы | In Russian |
In English | → Knowledge management → Libraries |
| INFRAWEBS | Intelligent Framework for Generating Open (Adaptable) Development Platforms for Web - Service Enabled Applications | In English | → Internet → Telecommunications |
| IOCP | ITS On-Board Computer Program | In English | |
| IODT | Integrated Ontology Development Toolkit | In English | → Programming languages → Data → Linguistics |
| IPL | Initial Program Load | In English | |
| IPLC | Initial Program Load Complete | In English | |
| IPLS | Initial Program Load Start | In English | |
| IPPS | Internet Programming and Promotion Service | In English | → Networks, communication |
| ISCCB | Internal Software Change Control Board | In English | |
| ISCM | Initial Software Configuration Map | In English | |
| iSDP | information Systems Designated Procurement (http://isdp.nih.gov) | In English | |
| ISDX | Interactive Surface Design eXtension | In English | → Engineering, technology |
| ISIS | Institute of Software Technology and Interactive Systems | In English | |
| ISSA | Integrated Software Safety Analysis | In English | |
| ISST | Institute for Software and Systems = ISST | Institut für Software- und Systemtechnik | In German |
In English | |
| ISST | Institut für Software- und Systemtechnik = (look above) |
In German | |
| ISV | Independent Software Vendor | In English | → Trade |
| ITDS | IBM Tivoli Directory Server | In English | |
| ITSE | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Software Engineering | In English | → Serial publications, periodicals |
| 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 |
| JCP | Java Community Process | In English | → Programming languages |
| JCSC | Journal of Circuits, Systems and Computers | In English | → Serial publications, periodicals |
| JDBC | Java DataBase Connectivity | In English | → Data |
| JDE | Java Development Environment | In English | → Programming languages |
| JEP | Java Math Expression Parser (www.singularsys.com/jep/) | In English | → Mathematics |
| JME | Java Monkey Engine | In English | |
| JME | JME Molecular Editor | In English | → Chemistry |
| JSGF | Java Speech API Grammar Format | In English | |
| JSON | JavaScript Object Notation | In English | |
| JSR | Java Specification Request | In English | → Programming languages |
| JVM | Java Virtual Machine | In English | → Programming languages |
| KBS | Knowledge-Based System | In English | |
| KBSA | Knowledge-Based Software Assistant | In English | → Knowledge management |
| KCO | Knowledge Content Object | In English | → Data |
| KDS | Kennedy-Developed Software | In English | → Spaceflight engineering, astronautics |
| KLM | Keyboard Layout Manager | In English | → Operating systems |
| KML | Keyhole Markup Language | In French | → Programming languages |
| LAMP | Linux, Apache, MySQL, PHP | In English | → Networks, communication |
| LiLoLiPo | Linux et les Logiciels Libres à Pont-Château | In French | → Organizations and associations → Operating systems |
| LinAC | Linux Angoulême Charente | In French | → Operating systems |
| LIS | Landinformationssystem | In German | → Geography |
| LISP | LISt Processing | In English | → Programming languages |
| LKD | Linux Kullanıcıları Derneği | In Turkish | → Operating systems |
| LLCSC | Low-Level Computer Software Component | In English | |
| LMO | Langages et Modèles à Objets | In French | → Programming languages |
| LMO | Liga Manager Online | In English | → Sport, physical exercises |
| LOC | Lines Of Code | In English | |
| LOLICA | LOgiciels LIbres en région Champagne-Ardenne | In French | → Programming languages |
| LOLICA | Logiciels Libres en Champagne-Ardenne | In French | → Organizations and associations |
| LoLiTa | Logiciels Libres à Tahiti et ses îles | In French | → Organizations and associations |
| LSB | Least Significant Bit | In English | |
| LTL | Linear Temporal Logic | In English | → Mathematics |
| LUG | Linux Users' Groups = GUL (look above) |
In English | → Organizations and associations → Operating systems |
| LUGOAL | Linux User Group Of ALgeria | In English | → Organizations and associations → Operating systems |
| LVS | Linux Virtual Server | In English | → Operating systems → Networks, communication |
| LVT | LPAR Validation Tool | In English | |
| MAB | Mozilla Amazon Browser | In English | |
| MAMP | My Arbitrary Precision Math (Library) | In English | → Mathematics |
| MASS | Mathematical Acceleration Subsystem | In English | → Programming languages → Mathematics |
| MathML | Mathematical Markup Language | In English | → Programming languages → Data → Mathematics |
| MCMS | Microsoft Content Management Server | In English | |
| MCP | Master Computer Program | In English | |
| MDA | Model Driven Architecture | In English | |
| MDC | Mozilla Developer Center | In English | → Networks, communication |
| MDSD | Model Driven Software Development | In English | |
| MESCAL | Middleware Efficiently SCALable | In English | → Networks, communication |
| MLP | Machine Language Program | In English | → Programming languages |
| MLUG | Montreal Linux Users Group | In English | → Organizations and associations → Operating systems |
| MMO | Massively Multiplayer Online | In English | → Networks, communication |
| MMORPG | Massively Multiplayer Online Role Playing Game | In English | |
| MOM | Message Oriented Middleware | In English | |
| MPL | Master Program Library | In English | |
| MRLUG | Montreal Regional Linux Users Group | In English | → Organizations and associations → Operating systems |
| MS-DOS | Microsoft Disk Operating System | In English | → Operating systems |
| MSDOS | Microsoft Disk Operating System | In English | → Operating systems |
| MSDOS | Mass Storage Digital Operating System | In English | → Operating systems |
| MSKLC | Microsoft Keyboard Layout Creator | In English | → Operating systems |
| MSS | Multisystem Software | In English | |
| MTJ | Mobile Tools for Java | In English | |
| MUMPS | Massachusetts General Hospital Utility Multi-Programming System | In English | → Programming languages → Medicine |
| MUS | Mission-Unique Software | In English | |
| MXML | Macromedia Flex Markup Language | In English | → Programming languages |
| NAUTILE | Noyau d'Aide à l'Usage, la Transmission et l'Installation des Logiciels libres sur l'Estuaire | In French | → Organizations and associations |
| NCM | Network Connection Manager | In English | → Networks, communication |
| NEPOMUK | Networked Environment for Personalized, Ontology-based Management of Unified Knowledge | In English | → Knowledge management |
| NESSI | Networked European Software and Services Initiative (www.nessi-europe.com) | In English | → Organizations and associations |
| OASCB | Orbiter Avionics Software Control Board | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| OASIS | Orbit Avionics Software Integration Study | In English | → Aeronautics, aircraft |
| OBCP | On-Board Computer Program | In English | |
| OCA | Oracle Certifiate Associate | In English | → Data |
| OCCP | Orbit Command Computer Program | In English | → Spaceflight engineering, astronautics |
| OCM | Oracle Certified Master | In English | → Data |
| OCML | Operational Conceptual Modelling Language | In English | → Programming languages |
| OCP | Oracle Certified Professional | In English | → Data |
| ODE | Orchestration Director Engine | In English | |
| ODE | Open Dynamics Engine (www.ode.org) | In English | → Image processing → Computer simulation |
| ODF | Output Data Formatter | In English | → Data |
| OIL | Ontology Inference Layer | In English | → Programming languages → Libraries |
| OLE | Object Linking and Embedding | In English | |
| OMAS | Operations Management Application Software | In English | → Management |
| OMG | Object Management Group | In English | → Organizations and associations |