| 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 |
| ILSA | Integrated Logistics Support Analysis | In English | → Maintenance and logistics |
| ILSC | Integrated Logistics Support Concept | In English | → Maintenance and logistics |
| ILSCP | Integrated Logistics Support Concept Plan | In English | → Maintenance and logistics |
| ILSIM | Integration of Lethality Studies Into Model | In English | → Maintenance and logistics |
| ILSMT | Integrated Logistics Support Management Team | In English | → Maintenance and logistics |
| ILSP | Integrated Logistics Support Plan | In English | → Maintenance and logistics |
| ILSWG | Integrated Logistics Support Working Group | In English | → Organizations and associations → Maintenance and logistics |
| IM | Interface Module | In English | → Human-computer interaction |
| IM | Information Memory | In English | → Memories |
| IMADS | Information Management Assimilation and Delivery System | In English | → Maintenance and logistics |
| IMAP | Internet Message Access Protocol | In English | → Networks, communication → Telecommunications |
| IMAP4 | Internet Message Access Protocol | In English | → Networks, communication |
| IMAS | Institutional Management Accounting System | In English | → Management |
| IMCP | Integrated Monitor and Control Panel | In English | → Human-computer interaction |
| IMDB | Integrated Maintenance Data Base | In English | → Data → Maintenance and logistics |
| IMI | Irish Management Institute | In English | → Management |
| IMIC | Integrated Management Information Computer | In English | → Management |
| IMIC | Integrated Management Information Center | In English | → Management |
| IMIT | Institute for Management of Innovation and Technology | In English | → Management → Engineering, technology |
| IMIX | Interactieve Multimodale Informatie Extractie | In Dutch | → Computer science |
| IMM | Institut Marocain de Management | In French | → Management → Higher education, universities |
| IMO | Integration Management Office | In English | → Management |
| IMOD | Informatique et Mathématiques de l'Organisation et de la Décision | In French | → Computer science → Management → Mathematics |
| IMP | Information Management Plan | In English | → Knowledge management |
| IMP | Initial Memory Protection | In English | → Memories |
| IMP | Inventory Management Plan | In English | → Management |
| IMP | Innovative Management Partner | In English | → Management |
| IMQ | Istituto Italiano del Marchio di Qualità (www.imq.it) | In Italian | → Quality management |
| IMS | Information Management System | In English | → Knowledge management |
| IMS | Inventory Management System | In English | → Knowledge management |
| IMS | IP Multimedia Subsystem | In English | → Telecommunications → Computer science |
| IMVN | Image, Multimédia et Vie Numérique | In French | → Computer science → 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 → Computer science → Telecommunications |
| InCo | Information and Computation | In English | → Serial publications, periodicals → Computer science |
| INEI | Institutul Naţional de Economie şi Informaţie | In Romanian | → Economics → Computer science |
| INEN | Instituto Ecuatoriano de Normalización | In Spanish | → Standardization |
| İNETD | İnternet Teknolojileri Derneği | In Turkish | → Organizations and associations → Networks, communication |
| InfCo | Information Control | In English | → Serial publications, periodicals → Computer science |
| InfD | Information Display | In English | → Serial publications, periodicals → Computer science |
| 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 → Computer science |
| INM | Institutul Naţional de Metrologie | In Romanian | → Standardization |
| INN | Instituto Nacional de Normalización (www.inn.cl) | In Spanish | → Standardization |
| INNORPI | Institut National de la Normalisation et de la Propriété Industrielle | In French | → Standardization → Industrial property |
| INRIA | Institut National de Recherche en Informatique et en Automatique | In French | → Research institutes → Computer science → Mechanical engineering |
| INRIA | Institut National de Recherche en Informatique et Automatique | In French | → Research institutes → Computer science → Electrical engineering |
| INSTAC | Information Technology Research and Standardization Center | In English | → Computer science → Telecommunications |
| INTAP | Interoperability Technology Association for Information Processing | In English | → Associations → Telecommunications → Computer-based techniques |
| INTEC | Independent Terminal Testing and Certification Consortium | In English | → Quality management |
| INTECO | Instituto de Normas Técnicas de Costa Rica (www.inteco.or.cr) | In Spanish | → Standardization |
| InTEEC | Information Technology and Electrical Engineering Consultant | In English | → Computer science → Electrical engineering → Consulting |
| IO | Input/Output | In English | → Computer science → 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 |
| IOLM | International Organization of Legal Metrology | In English | → Organizations and associations → Standardization |
| IOLS | Infrastructures et Outils Logiciels pour la Simulation | In French | → Computer science |
| 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 | → Computer science → 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 | → Computer science → Telecommunications |
| IPA | International Phonetic Association | In English | → Associations → Writing systems |
| IPA | Institute for Programming research and Algorithmics | In English | → Computer science → Mathematics |
| IPA | Internationales Phonetisches Alphabet = AFI | Alfabetul Fonetic Internaţional | In Romanian = LFE | Lizherenneg Fonetikel Etrebroadel | In Breton = МФА | Международната фонетична азбука | In Bulgarian = AFI | Alfabet fonètic internacional | In Catalan = IFA | Internacia Fonetika Alfabeto | In Esperanto = IPA | International Phonetic Alphabet | In English = ΔΦΑ | Διεθνές Φωνητικό Αλφάβητο | In Greek = IPA | Internationales Phonetisches Alphabet | In German = API | Alphabet Phonétique International | In French = AFI | Alfabeto Fonético Internacional | In Spanish = AFI | Alfabeto Fonético Internacional | In Galician = NAF | Nazioarteko Alfabeto Fonetikoa | In Basque = IPA | Internationalt Phonetescht Alphabet | In Letzeburgesh = AFI | Alfabeto Fonetico Internazionale | In Italian = МФА | Международный фонетический алфавит | In Russian = AFI | Alfabeto Fonético Internacional | In Portuguese = AFI | Alfabet fonetic internacionau | In Occitan = AFE | Alfabet Fonetike Eternåcionå | In Walloon = IFA | Internationoal Fonetisch Alfabet | In Vlaams = AFN | Alfabeti Fonetik Ndërkombëtar | In Albanian |
In Tosk | → Writing systems |
| IPA | Internationalt Phonetescht Alphabet = AFI, LFE, МФА, IFA, ΔΦΑ, API, NAF, AFE, AFN (look above) |
In Letzeburgesh | → Writing systems |
| IPA | International Phonetic Alphabet = AFI, LFE, МФА, IFA, ΔΦΑ, API, NAF, AFE, AFN (look above) |
In English | → Writing systems |
| IPA | Internationales Phonetisches Alphabet = AFI, LFE, МФА, IFA, ΔΦΑ, API, NAF, AFE, AFN (look above) |
In German | → Writing systems |
| IPA | Internet Privatstiftung Austria | In German | → Foundations → Networks, communication → Telecommunications |
| 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 → Computer science |
| 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 → Computer science |
| IPPS | International Parallel Processing Symposium | In English | → Congresses → Computer-based techniques → Mathematics |
| IPPS | Internet Programming and Promotion Service | In English | → Software → Networks, communication |
| IPQ | Instituto Português da Qualidade (www.ipq.pt) | In Portuguese | → Quality management |
| IPRCS | Irish Pattern Recognition and Classification Society | In English | → Organizations and associations → Computer-based techniques |
| IPS | International Pipe Standard | In English | → Standardization |
| IPS | Information Processing System | In English | → Computer science |
| IPSI | Institut für Integrierte Publikations- und Informationssysteme | In French | → Computer science → 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 |
| IPTL | Institut Pédagogique Transport Logistique | In French | → Maintenance and logistics → Transport and postal services |
| IR&D | Independent Research and Development | In English | → Research policy → Engineering, technology |
| IRAM | Input Random Access Memory | In English | → Memories |
| IRAM | Instituto Argentino de Racionalización de Materiales (www.iram.com.ar) | In Spanish | → Standardization |
| IRANET | Iranian Research and Academic Network | In English | → Research policy → Education |
| IRCCS | Istituto di Ricovero e Cura a Carattere Scientifico | In Italian | → Research institutes → Research policy |
| IRCICA | Research Centre for Islamic History, Art and Culture | In English | → Research institutes → Islam → Arts → History → Civilization, culture, progress |
| IRD | Interface Requirements Document | In English | → Human-computer interaction |
| IRD | Information Requirements Document | In English | → Knowledge management |
| IRD | Information Requirements Description | In English | → Knowledge management |
| IRG | (Marie Curie) International Reintegration Grants | In English | → Research policy → Labour, labour economics |
| IRI | Internationalized Resource Identifier | In English | → Networks, communication |
| IRI | Institut de Recherche et d'Innovation (www.iri.centrepompidou.fr) | In French | → Research institutes → Research policy → Civilization, culture, progress |
| IRIS | Indexation et Reconnaissance d’Images par la Sémantique | In French | → Computer-based techniques → Semiotics |
| IRIS | Imaginons un Réseau Internet Solidaire | In French | → Internet → Organizations and associations |
| IRIT | Institut de Recherche Informatique de Toulouse (www.irit.fr) | In French | → Research institutes → Computer science |
| IRIT | Institut de Recherche en Informatique de Toulouse | In French | → Research institutes → Computer science |
| IRL | Interface Requirements List | In English | → Human-computer interaction |
| IRM | Information Resource Management | In English | → Knowledge management |
| 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 |
| IS | International Standard | In English | → Standardization |
| ISBN | International Standard Book Number | In English | → Libraries → Standardization |
| ISC | Information Systems Center | In English | → Data → Knowledge management |
| ISCAE | Institut Supérieur de Commerce et d'Administration des Entreprises | In French | → Management → Higher education, universities |
| ISCAR | International Society for Cultural and Activity Research | In English | → Organizations and associations → Social sciences → Civilization, culture, progress |
| ISCC | Information Systems Coordination Committee = CCSI | Comité de Coordinación de los Sistemas de Información | In Spanish = CCSI | Comité de Coordination des Systèmes d'Information | In French = CCSI | Comitê de Coordenação de Sistemas de Informação | In Portuguese |
In English | → Knowledge management → United Nations |
| ISCCB | Internal Software Change Control Board | In English | → Software |
| ISCED | International Standard Classification of Education | In English | → Standardization → Education |
| ISCM | Initial Software Configuration Map | In English | → Software |
| ISCO | International Standard Classification of Occupations | In English | → Standardization → Labour, labour economics |
| 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 science → Computer-based techniques |
| ISIR | Institute of Scientific and Industrial Research | In English | → Research policy → Engineering, technology |
| ISIR | Institut des Systèmes Intelligents et de Robotique | In French | → Research institutes → Artificial intelligence → Electrical engineering → Engineering, technology |
| ISIRI | Institute of Standards and Industrial Research of Iran | In English | → Standardization → Research policy |
| ISIS | Institute of Software Technology and Interactive Systems | In English | → Software |
| ISIS | Ingénierie des Systèmes d'Information et de Sécurité | In French | → Computer science → Telecommunications |
| ISIS | Integrated Safety Information System | In English | → Data → Knowledge management |
| ISM | ISDN (Integrated Services Digital Network) Standards Management | In English | → Networks, communication → Telecommunications |
| ISMP | Institut Supérieur de Management Public | In French | → Management → Public administration, government |
| ISMRB | Information Systems Management Review Board | In English | → Data → Knowledge management |
| ISMS | Interactive Supply Management System | In English | → Management |
| ISO | International Standardization Organization | In English | → Standardization → Organizations and associations |
| ISOC | Internet Society | In English | → Internet → Organizations and associations |
| ISP | International Standardized Profile | In English | → Standardization |
| ISSA | Integrated Software Safety Analysis | In English | → Software |
| ISSN | International Standard Serial Number | In English | → Standardization → Bibliography → Libraries |
| ISSO | Information Systems Security Office | In English | → Knowledge management |
| ISSS | Information Society Standardization System | In English | → Standardization → Computer science → 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 |
| IST | Íslenkir Staðlar | In English | → Standardization |
| ISTAG | Information Society Technologies Advisory Group | In English | → Organizations and associations → Networks, communication → Telecommunications |
| ISTI | Istituto di Scienza e Tecnologie dell'Informazione | In Italian | → Computer science → Telecommunications |
| ISTK | Internacia Studumo pri Turismo kaj Kulturo | In Esperanto | → Tourism → Specialized or (poly)technical colleges → Civilization, culture, progress |
| ISU | International System of Units | In English | → 006 |
| ISV | Independent Software Vendor | In English | → Trade → Software |
| 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 | → Computer science → Telecommunications |
| IT | Inligtingstegnologie = TI (look above) |
In Afrikaans | → Computer science → Telecommunications |
| IT | Informatie Technologie | In Frisian | → Computer science → Telecommunications |
| IT | Information Technology = TI (look above) |
In English | → Computer science → Telecommunications |
| ITAA | Information Technology Association of America | In English | → Associations → Computer science → 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 | → Computer science → Telecommunications |
| ITeR | Informatietechnologie en Recht | In Dutch | → Computer science → Law, jurisprudence |
| ITI | Instituto Tecnológico de Informática (www.iti.upv.es) | In Spanish | → Research institutes → Computer science |
| ITIL | IT Infrastructure Library | In English | → Libraries → Computer science → Telecommunications |
| ITIP | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Image Processing | In English | → Serial publications, periodicals → Computer science |
| ITIT | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Information Theory | In English | → Serial publications, periodicals → 007 |
| ITNN | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Neural Networks | In English | → Serial publications, periodicals → Computer science → 007 |
| ITPAM | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Pattern Analysis and Machine Intelligence | In English | → Serial publications, periodicals → Computer science → Mathematics |
| ITS | Intercept Trajectory Simulation | In English | → Computer simulation → Vehicle engineering |
| ITS | Institut de Traitement des Signaux | In French | → Computer-based techniques → Telecommunications |
| ITS | Issue and Tracking System | In English | → Management |
| 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 | → Computer science |
| ITSMC | IEEE (Institute of Electrical and Electronics Engineers) Transactions on Systems, Man and Cybernetics | In English | → Serial publications, periodicals → Computer science |
| ITSTC | Information Technology Steering Committee | In English | → Organizations and associations → Computer science → Telecommunications |
| ITTF | Information Technology Task Force | In English | → Computer science |
| ITU-T | International Telecommunications Union - Telecommunications Standardization Sector | In English | → Standardization → Telecommunications |
| 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 |