| IDOT | Instrument Digital On-Line Transcriber | In English | → Hardware |
| IDP | Integrated Data Processing | In English | → Data |
| IDP | Interface Digital Processor | In English | → Hardware → Human-computer interaction |
| IDR | Interim Data Review | In English | → Data |
| IDS | Information Data System | In English | → Data → Knowledge management |
| IDS | Integrated Display System | In English | → Human-computer interaction |
| IDS | Interface Data Sheet | In English | → Human-computer interaction → Data |
| IDSNET | Integrated Defense System Network | In English | → 355 → Military engineering → Networks, communication |
| IDSNET | Integrated Defense Simulator Network | In English | → Military engineering → Networks, communication |
| IDTC | IEEE (Institute of Electrical and Electronics Engineers) Design Test Computers | In English | → Serial publications, periodicals → Hardware |
| IDU | Interface Demonstration Unit | In English | → Human-computer interaction |
| IEDR | Ireland's Domain Registry | In English | → Networks, communication → Telecommunications |
| IEEEN | IEEE (Institute of Electrical and Electronics Engineers) Network | In English | → Serial publications, periodicals → Telecommunications |
| IEI | Istituto di Elaborazione dell’Informazione | In Italian | |
| IEIWG | International Element Interface Working Group | In English | → Human-computer interaction |
| IEMCAP | Intrasystem Electromagnetic Compatibility Computer Analysis Program | In English | → Computer-based techniques → Electrical engineering |
| IES | Information Extraction System | In English | → Data |
| IESG | Internet Engineering Steering Group | In English | → Organizations and associations → Internet |
| IETF | Internet Engineering Task Force | In English | → Organizations and associations → Networks, communication |
| IFA | Interface Functional Analysis | In English | → Human-computer interaction |
| IFCG | Interface Control Group | In English | → Human-computer interaction |
| IFDL | Interfacility Data Link | In English | → Data |
| IFF | Interchange File Format | In French | → Data |
| IFIP | International Federation for Information Processing | In English | → Organizations and associations |
| IFS | Interface Specification | In English | → Human-computer interaction |
| IFT | Interface Tool | In English | → Human-computer interaction |
| IFTD | Interface Terminal Distributor | In English | → Human-computer interaction |
| IFU | Interface Unit | In English | → Human-computer interaction |
| IGAAC | Internet Guide for Asian American Cybernauts | In English | → Internet |
| IGB | Institute for Genomics and Bioinformatics | In English | → Biological sciences |
| IGCS | Internet Guide for China Studies | In English | → Internet → Area studies |
| IGDA | International Game Developers Association (www.igda.org) | In English | → Associations → Software → Entertainment |
| IGDS | Interactive Graphic Design System | In English | → Graphical processing |
| IGES | Initial Graphic Exchange Specification | In English | → Graphical processing |
| IGMP | Internet Group Management Protocol | In English | → Networks, communication → Telecommunications |
| IGP | Internal Gateway Protocol | In English | → Networks, communication |
| IGU | Interfaz Gráfica de Usuario = GUI | Graphical User Interface | In English |
In Spanish | → Human-computer interaction |
| IHM | Interface Homme-Machine = MDI | Människa-datorinteraktion | In Swedish = MMI | Man-Machine Interaction | In English = CHI | Computer-Human Interaction | In English |
In French | → Human-computer interaction |
| IHSR | Integrated Hardware/Software Review | In English | → Hardware → Software |
| IHV | Independent Hardware Vendor | In English | → Hardware → Trade |
| II | Instytut Informatyk | In Polish | → Research institutes |
| IIOP | Internet Inter Orb Protocol | In English | → Software → Networks, communication |
| IIS | Interface Identification Sheet | In English | → Human-computer interaction |
| IIT | Istituto di Informatica e Telematica | In Italian | → Telecommunications |
| IJCAI | International Joint Conference on Artificial Intelligence | In English | → Congresses → Artificial intelligence |
| IJCV | International Journal of Computer Vision | In English | → Serial publications, periodicals |
| IJDAR | International Journal in Document Analysis and Recognition | In English | → Serial publications, periodicals → Computer-based techniques |
| IJHSC | International Journal of High Speed Computing | In English | → Serial publications, periodicals |
| IJICS | International Journal of Intelligent Control and Systems | In English | → Artificial intelligence → Serial publications, periodicals → Engineering, technology |
| IJIG | International Journal of Image and Graphics | In English | → Serial publications, periodicals → Graphical processing → Image processing |
| IJMM | International Journal of Mini Microcomputers | In English | → Serial publications, periodicals → Hardware → Electronics |
| IJMoS | International Journal of Modelling and Simulation | In English | → Computer simulation → Serial publications, periodicals |
| IJScA | International Journal of Supercomputer Applications | In English | → Serial publications, periodicals |
| IKT | Informations- og kommunikationsteknologi = TIC | Tecnologías de la Información y la Comunicación | In Spanish = IKT | Informations- und Kommunikationstechnologie | In German = TIC | Technologies de l'Information et de la Communication | In French = ICT | Information and Communications Technology | In English = IKT | Inligtings- en kommunikasietegnologie | In Afrikaans = ICT | Informatie- en Communicatietechnologie | In Dutch = TMK | Teknologi Maklumat dan Komunikasi | In Malay |
In Danish | → Telecommunications |
| IKT | Informations- und Kommunikationstechnologie = TIC, ICT, TMK (look above) |
In German | → Telecommunications |
| IKT | Inligtings- en kommunikasietegnologie = TIC, ICT, TMK (look above) |
In Afrikaans | → Telecommunications |
| ILBM | InterLeaved BitMap | In English | → Graphical processing → Image processing |
| ILC | Istituto di Linguistica Computazionale | In Italian | → Computer-based techniques → Linguistics |
| ILM | Information Lifecycle Management | In English | → Document processing → Knowledge management |
| ILP | Inductive Logic Programming | In English | → 5196 |
| 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 → Software |
| IM | Information Memory | In English | → Memories |
| IM | Interface Module | In English | → Human-computer interaction |
| IMAP | Internet Message Access Protocol | In English | → Networks, communication → Telecommunications |
| IMAP4 | Internet Message Access Protocol | In English | → Networks, communication |
| IMCP | Integrated Monitor and Control Panel | In English | → Human-computer interaction |
| IMDB | Integrated Maintenance Data Base | In English | → Data → Maintenance and logistics |
| IMIX | Interactieve Multimodale Informatie Extractie | In Dutch | |
| IMOD | Informatique et Mathématiques de l'Organisation et de la Décision | In French | → Management → Mathematics |
| IMP | Initial Memory Protection | In English | → Memories |
| IMS | IP Multimedia Subsystem | In English | → Telecommunications |
| IMVN | Image, Multimédia et Vie Numérique | In French | → Cinema, movies |
| INA | Integrated Network Analyzer | In English | → Networks, communication |
| INAP | Intelligent Network Application Part | In English | → Networks, communication → Telecommunications |
| INCITS | International Committee for Information Technology Standards | In English | → Standardization → Telecommunications |
| InCo | Information and Computation | In English | → Serial publications, periodicals |
| INEI | Institutul Naţional de Economie şi Informaţie | In Romanian | → Economics |
| İNETD | İnternet Teknolojileri Derneği | In Turkish | → Organizations and associations → Networks, communication |
| InfCo | Information Control | In English | → Serial publications, periodicals |
| InfD | Information Display | In English | → Serial publications, periodicals |
| INFRAWEBS | Intelligent Framework for Generating Open (Adaptable) Development Platforms for Web - Service Enabled Applications | In English | → Software → Internet → Telecommunications |
| INI | Institut National d'Informatique | In French | → Specialized or (poly)technical colleges |
| INRIA | Institut National de Recherche en Informatique et Automatique | In French | → Research institutes → Electrical engineering |
| INRIA | Institut National de Recherche en Informatique et en Automatique | In French | → Research institutes → Mechanical engineering |
| INSTAC | Information Technology Research and Standardization Center | In English | → Telecommunications |
| INTAP | Interoperability Technology Association for Information Processing | In English | → Associations → Telecommunications → Computer-based techniques |
| InTEEC | Information Technology and Electrical Engineering Consult | In English | → Electrical engineering |
| IO | Input/Output | In English | → Engineering, technology |
| IOA | Input/Output Adapter | In English | → Data |
| IOB | Input/Output Box | In English | → Hardware → Data |
| IOB | Input/Output Buffer | In English | → Data |
| IOB | Input/Output Bus | In English | → Data |
| IOBPS | Input/Output Box and Peripheral Simulator | In English | → Hardware → Data |
| IOC | Input/Output Controller | In English | → Data |
| IOCP | ITS On-Board Computer Program | In English | → Software |
| IODT | Integrated Ontology Development Toolkit | In English | → Programming languages → Data → Linguistics |
| IOLS | Infrastructures et Outils Logiciels pour la Simulation | In French | |
| IOM | Input/Output Module | In English | → Data |
| IOP | Input/Output Part | In English | → Data |
| IOP | Input/Output Processor | In English | → Hardware → Data |
| IOPT | Input/Output Parameter Table | In English | → Data |
| IOQE | Input/Output Queue Element | In English | → Data |
| IORL | Input/Output Requirements Language | In English | → Data |
| IORTD | Input/Output Relationships and Timing Diagram | In English | → Data |
| IOS | Input/Output Supervisor | In English | → Data |
| IOT | Individuum Organisation Technologie | In German | → 659 |
| IOU | Input/Output Unit | In English | → Data |
| IP | Instrument Processor | In English | → Hardware |
| IP | Interfacing Processor | In English | → Hardware → Human-computer interaction |
| IP | Internet Protocol | In English | → Internet |
| IPA | Information-technology Promotion Agency | In English | → Telecommunications |
| IPA | Internet Privatstiftung Austria | In German | → Foundations → Networks, communication → Telecommunications |
| IPA | Institute for Programming research and Algorithmics | In English | → Mathematics |
| iPAC | Internet/Intranet Public Access Catalogue | In English | → Bibliography → Libraries → Networks, communication |
| IPB | Invision Power Board | In English | → Networks, communication |
| IPCDT | IEE Proceedings: Computers and Digital Techniques | In English | → Serial publications, periodicals |
| IPEA | Internet Positionning European Association | In English | → Associations → Networks, communication → 659 |
| IPER | Innovation dans les Processus de l’Entreprise par la RFID | In English | → Networks, communication → Telecommunications |
| IPF | Internet pour la France | In French | → Internet → Organizations and associations → Telecommunications |
| IPIG | ILL Protocol Implementers Group | In English | → Organizations and associations → Networks, communication → Libraries |
| IPL | Initial Program Load | In English | → Software |
| IPLC | Initial Program Load Complete | In English | → Software |
| IPLS | Initial Program Load Start | In English | → Software |
| IPM | Information Processing and Management | In English | → Serial publications, periodicals |
| IPPS | International Parallel Processing Symposium | In English | → Congresses → Computer-based techniques → Mathematics |
| IPPS | Internet Programming and Promotion Service | In English | → Software → Networks, communication |
| IPRCS | Irish Pattern Recognition and Classification Society | In English | → Organizations and associations → Computer-based techniques |
| IPS | Information Processing System | In English | |
| IPSI | Institut für Integrierte Publikations- und Informationssysteme | In French | → Knowledge management |
| IPSJ | Information Processing Society of Japan | In English | → Organizations and associations → Computer-based techniques |
| IPSL | Interface Problem Status Log | In English | → Human-computer interaction |
| IRAM | Input Random Access Memory | In English | → Memories |
| IRD | Interface Requirements Document | In English | → Human-computer interaction |
| IRI | Internationalized Resource Identifier | In English | → Networks, communication |
| IRIS | Imaginons un Réseau Internet Solidaire | In French | → Internet → Organizations and associations |
| IRIS | Indexation et Reconnaissance d’Images par la Sémantique | In French | → Computer-based techniques → Semiotics |
| IRIT | Institut de Recherche Informatique de Toulouse (www.irit.fr) | In French | → Research institutes |
| IRIT | Institut de Recherche en Informatique de Toulouse | In French | → Research institutes |
| IRL | Interface Requirements List | In English | → Human-computer interaction |
| IRN | Interface Revision Notice | In English | → Human-computer interaction |
| IRR | Interface Requirements Review | In English | → Human-computer interaction |
| IRRMA | Institut Romand de Recherche Numérique en Physique de Matériaux | In French | → Computer simulation → Physics |
| IRS | Interface Requirements Specification | In English | → Human-computer interaction |
| ISC | Information Systems Center | In English | → Data → Knowledge management |
| ISCCB | Internal Software Change Control Board | In English | → Software |
| ISCM | Initial Software Configuration Map | In English | → Software |
| ISDN | Institut des Sciences du Document Numérique (http://isdn.enssib.fr) | In English | → Libraries → Document processing |
| iSDP | information Systems Designated Procurement (http://isdp.nih.gov) | In English | → Software |
| ISDP | IntelliLight Shared Dual Path | In English | → Networks, communication → Telecommunications |
| ISDX | Interactive Surface Design eXtension | In English | → Software → Engineering, technology |
| ISEN | Institut Supérieur d'Électronique et du Numérique | In French | → Computer-based techniques → Electronics |
| ISIMA | Institut Supérieur d'Informatique, de Modélisation et de leurs Applications | In French | → Computer-based techniques |
| ISIR | Institut des Systèmes Intelligents et de Robotique | In French | → Research institutes → Artificial intelligence → Electrical engineering → Engineering, technology |
| ISIS | Institute of Software Technology and Interactive Systems | In English | → Software |
| ISIS | Integrated Safety Information System | In English | → Data → Knowledge management |
| ISIS | Ingénierie des Systèmes d'Information et de Sécurité | In French | → Telecommunications |
| ISM | ISDN (Integrated Services Digital Network) Standards Management | In English | → Networks, communication → Telecommunications |
| ISMRB | Information Systems Management Review Board | In English | → Data → Knowledge management |
| ISOC | Internet Society | In English | → Internet → Organizations and associations |
| ISSA | Integrated Software Safety Analysis | In English | → Software |
| ISSS | Information Society Standardization System | In English | → Standardization → Telecommunications |
| ISST | Institute for Software and Systems = ISST | Institut für Software- und Systemtechnik | In German |
In English | → Software |
| ISST | Institut für Software- und Systemtechnik = (look above) |
In German | → Software |
| ISTAG | Information Society Technologies Advisory Group | In English | → Organizations and associations → Networks, communication → Telecommunications |
| ISTI | Istituto di Scienza e Tecnologie dell'Informazione | In Italian | → Telecommunications |
| ISV | Independent Software Vendor | In English | → Software → Trade |
| IT | Informationstechnik = IT | Information Technology | In English = IT | Inligtingstegnologie | In Afrikaans = TI | Tecnologia da Informação | In Portuguese = TI | Tecnoloxías da información | In Galician |
In German | → Telecommunications |
| IT | Informatie Technologie | In Frisian | → Telecommunications |
| IT | Inligtingstegnologie = TI (look above) |
In Afrikaans | → Telecommunications |
| IT | Information Technology = TI (look above) |
In English | → Telecommunications |
| ITAA | Information Technology Association of America | In English | → Associations → Telecommunications |
| iTACITUS | Intelligent Tourism And Cultural Information Through Ubiquitous Services | In English | → Networks, communication → Civilization, culture, progress → Tourism |
| ITCAD | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Computer Aided Design | In English | → Serial publications, periodicals → Computer-based techniques → 62001 |
| ITCmp | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Computers | In English | → Serial publications, periodicals → Hardware |
| ITDS | IBM Tivoli Directory Server | In English | → Software |
| ITEA | Information Technology for European Advancement | In English | → Telecommunications |
| ITeR | Informatietechnologie en Recht | In Dutch | → Law, jurisprudence |
| ITI | Instituto Tecnológico de Informática (www.iti.upv.es) | In Spanish | → Research institutes |
| ITIL | IT Infrastructure Library | In English | → Libraries → Telecommunications |
| ITIP | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Image Processing | In English | → Serial publications, periodicals |
| ITNN | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Neural Networks | In English | → Serial publications, periodicals → 007 |
| ITPAM | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Pattern Analysis and Machine Intelligence | In English | → Serial publications, periodicals → Mathematics |
| ITS | Intercept Trajectory Simulation | In English | → Computer simulation → Vehicle engineering |
| ITS | Institut de Traitement des Signaux | In French | → Computer-based techniques → Telecommunications |
| ITSC | Interregional Telecommunications Standards Committee | In English | → Organizations and associations → Networks, communication → Telecommunications |
| ITSE | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Software Engineering | In English | → Serial publications, periodicals → Software |
| ITSM | IT Service Management | In English | |
| ITSMC | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Systems, Man and Cybernetics | In English | → Serial publications, periodicals |
| ITSTC | Information Technology Steering Committee | In English | → Organizations and associations → Telecommunications |
| ITTF | Information Technology Task Force | In English | |
| IU | Interface Unit | In English | → Human-computer interaction |
| IUA | Interface Unit Adapter | In English | → Human-computer interaction |
| IUE | Interface Unit Error | In English | → Human-computer interaction |
| IUI | Integrated User Interface | In English | → Human-computer interaction |
| IUP | International Usability Partners | In English | → Human-computer interaction |
| IUPRAI | Indian Unit for Pattern Recognition and Artificial Intelligence | In English | → Organizations and associations → Artificial intelligence → Computer-based techniques |
| IVE | Interface Verification Equipment | In English | → Human-computer interaction |
| İvHP | İnternet ve Hukuk Platformu | In Turkish | → Networks, communication |
| IVP | Interface Verification Plan | In English | → Human-computer interaction |
| IVR | Interactive Voice Recognition | In English | → Computer-based techniques → Telecommunications |