| AMADEIA | Association Marocaine pour le Développement de l'Électronique, de l'Électrotechnique, de l'Informatique et de l'Automatique | In French | → Organizations and associations → Electrical engineering → Electronics → Computer science |
| AMBD | Automated Maintenance Data Base | In English | → Data → Maintenance and logistics |
| AMCSIT | Agenţia Managerială de Cercetare Ştiinţifică, Inovare şi Transfer Tehnologic | In Romanian | → Research policy → Engineering, technology |
| AMDEC | Analyse des Modes de Défaillances, de leurs Effets et de leur Criticité | In French | → Quality management |
| AMeLi | Assurance Maladie en Ligne | In French | → Networks, communication → Insurance → Medicine |
| AMJ | Association du Multimédia Jeunesse (www.amj.asso.fr) | In French | → Associations → Software |
| AMN | Asociación MERCOSUR para la Normalización | In Spanish | → Associations → Standardization |
| AMREF | African Medical and Research Foundation | In English | → Foundations → Medicine → Research policy |
| AMUL | Amicale Malgache des Utilisateurs de logiciels Libres | In French | → Organizations and associations → Operating systems |
| AMULL | Association Malienne des Utilisateurs de Logiciels Libres | In French | → Associations → Operating systems |
| ANAB | ANSI-ASQ National Accreditation Board | In English | → Organizations and associations → Standardization |
| ANDCP | Association Nationale des Directeurs et Cadres de la fonction Personnel | In French | → Associations → 0055 → Personnel management |
| ANDIH | Agence Nationale de l'Informatique Hospitalière | In French | → Computer science → Organizations and associations → Medicine |
| AnGVP | Annales du Bureau des Longitudes | In French | → Serial publications, periodicals → 006 |
| ANIS | Asociaţia Naţională a Industriei de Software şi Servicii din România | In Romanian | → Associations → Software → Telecommunications |
| ANIS | Association Nord Internet Solidaire | In French | → Internet → Associations → Telecommunications |
| AnMAI | Annals of Mathematics and Artificial Intelligence | In English | → Serial publications, periodicals → Mathematics → Computer science |
| ANR | Agence Nationale de la Recherche (www.agence-nationale-recherche.fr) | In French | → Research policy |
| ANRT | Association Nationale de la Recherche Technique | In French | → Research policy → Associations → Engineering, technology |
| ANSI | American National Standards Institute | In English | → Organizations and associations → Standardization |
| ANVAR | Agence Nationale de Valorisation de la Recherche | In French | → Research policy → Economics → Applied sciences, technology |
| ANVREDET | Agence Nationale de la Valorisation des Résultats de la Recherche et du Développement Technologique | In French | → Research policy → Engineering, technology |
| AOC | Auxiliary Output Chip | In English | → Hardware |
| AOCE | Apple Open Collaboration Environment | In English | → Software |
| AOCP | AVCS On-Board Computer Program | In English | → Software |
| AODI | Always On/Dynamic ISDN | In English | → Networks, communication |
| AOSTE | Analyse et l'Optimisation des Systèmes Temps-Réel Embarqués | In French | → Computer science → Electronics |
| ApAI | Applied Artificial Intelligence | In English | → Serial publications, periodicals → Computer science |
| APAN | Asia-Pacific Advanced Network Consortium | In English | → Computer science → Telecommunications |
| APB | Advanced Peripheral Bus | In English | → Hardware |
| APCC | Association of Professional Computer Consultants | In English | → Computer science → Associations → Consulting |
| APDL | ADA Programming Design Language | In English | → Computer science |
| APELSE | Association pour la Promotion de l'Écriture et de la Lecture sur Support Électronique | In French | → Computer science → Organizations and associations |
| API | Application Programming Interface | In English | → Software → Networks, communication |
| API | Application Program Interface | In English | → Software → Networks, communication |
| API | American Petroleum Institute | In English | → Standardization → Mining → 665 |
| API | Alphabet Phonétique International = AFI | Alfabetul Fonetic Internaţional | In Romanian = LFE | Lizherenneg Fonetikel Etrebroadel | In Breton = МФА | Международната фонетична азбука | In Bulgarian = IPA | Internationales Phonetisches Alphabet | In Tosk = 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 = 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 French | → Writing systems |
| API-PL | Association pour la Promotion d'Internet pour les Professions Libérales | In French | → Associations → Networks, communication → Telecommunications |
| APIC | Asociaţia pentru Tehnologia Informaţiei şi Comunicaţii din România | In Romanian | → Associations → Computer science → Telecommunications |
| APINC | Association Pour la Promotion et la défense de l'Internet Non Commercial | In French | → Internet → Associations |
| APL | Applications Program Library | In English | → Libraries → Software |
| APL | A Pattern Language | In English | → Software |
| APL2C | Association for Persian Language, Linguistics and Computing | In English | → Associations → Computer-based techniques → Linguistics |
| APLM | Applications Program Library Maintenance | In English | → Libraries → Software |
| APLMF | Asia-Pacific Legal Metrology Forum | In English | → Standardization |
| APM | Application Performance Management | In English | → Software |
| APMSM | Assembly Phase Maintenance Simulation Model | In English | → Maintenance and logistics |
| APOM | Association des Producteurs d'Oeuvres Multimédia (www.apom.org) | In French | → Associations → Software → Arts |
| APON | ATM Passive Optical Network | In English | → Networks, communication |
| APP | Agence de Protection des Programmes (http://app.legalis.net) | In French | → Software → Industrial property |
| APPC | Advanced Program-to-Program Communications | In English | → Software → Networks, communication |
| APPN | Advanced Peer-to-Peer Networking | In English | → Networks, communication |
| APQP | Advanced Product Quality Planning | In English | → Quality management |
| APRE | Agenzia per la Promozione della Ricerca Europea | In Italian | → Research policy → European Union |
| APROGED | Association des PROfessionnels de la Gestion Électronique de l'information et des Documents pour l'entreprise | In French | → Libraries → Organizations and associations → Knowledge management |
| APRONET | Association des Professionnels Internet et Webmestres Territoriaux | In French | → Internet → Associations |
| APRP | Associação Portuguesa de Reconhecimento de Padrões | In Portuguese | → Associations → Computer-based techniques |
| APTES | Association du Pôle Transactions Électroniques Sécurisées | In French | → Associations → Networks, communication → Telecommunications |
| AQ | Assurance Qualité | In French | → Quality management |
| AQC | Agence Qualité Construction (www.qualiteconstruction.com) | In French | → Quality management → Building |
| ARAP | AppleTalk Remote Access Protocol | In English | → Software → Networks, communication |
| ARATEM | Agence Rhône-Alpes pour la Maîtrise des Technologies de Mesure | In French | → Organizations and associations → Standardization |
| ARC | Austrian Research Centers | In English | → Research policy → Engineering, technology |
| ARC | ALEPH Reporting Center | In English | → Organizations and associations → Libraries → Software |
| ARD | Apple Remote Desktop | In English | → Hardware → Networks, communication |
| ARDOISE | Application de Recueil de la Documentation Opérationnelle et d'Information Statistique sur les Enquêtes | In French | → Software → Police |
| ARIST | Agence Régionale d'Information Stratégique et Technologique | In French | → Research policy → Libraries → Engineering, technology |
| ARL | Association of Research Libraries | In French | → Associations → Libraries → Research policy |
| ARM | Asynchronous Response Mode | In English | → Networks, communication → Telecommunications |
| ARMT | Autorité de Régulation des Mesures Techniques | In French | → Computer science → Artistic property |
| ARP | Address Resolution Protocol | In English | → Internet |
| ARSC | Arctic Region Supercomputing Center | In English | → Computer simulation |
| ARTESI | Agence Régionale des Technologies et de la Société de l'Information d'Île-de-France | In French | → Computer science → Engineering, technology → Telecommunications |
| ARTS | Actions de Recherche pour la Technologie et la Société | In French | → Research policy → Engineering, technology |
| ASA | American Standards Association | In English | → Associations → Standardization |
| ASA | Adaptive Server Anywhere | In English | → Computer science |
| ASAI | Adjunct/Switch Application Interface | In English | → Networks, communication → Telecommunications |
| ASB | Advanced System Buffering | In English | → Networks, communication → Telecommunications |
| ASC | Apple Sound Chip | In English | → Computer-based techniques → Electronics |
| ASCI | Advanced School for Computing and Imaging | In English | → Specialized or (poly)technical colleges → Graphical processing → Image processing |
| ASCII | American Standard Code for Information Exchange | In English | → Data → Standardization |
| ASCII | American Standard Code for Information Interchange | In English | → Computer science |
| ASCOT | Advanced Scientific Computing Team | In English | → Computer simulation → 5196 |
| ASDTIC | Analog-Signal-to-Discrete-Time-Interval Converter | In English | → Hardware |
| ASF | Auto Sheet Feeder | In English | → Hardware |
| ASF | Advanced Streaming Format | In English | → Networks, communication → Telecommunications |
| ASFP | askSam File Pointer | In English | → Software → Data |
| ASG | Aeronautical Standards Group | In English | → Standardization → Aeronautics, aircraft |
| ASIP | AppleShare IP | In English | → Networks, communication → Telecommunications |
| ASJR | Association des Salles de Jeux en Réseau (www.asjr.net) | In French | → Associations → Software → Entertainment |
| ASN.1 | Abstract Syntax Notation One | In English | → Programming languages |
| ASP | Active Server Pages | In English | → Software → Networks, communication |
| ASP | AppleTalk Session Protocol | In English | → Networks, communication → Telecommunications |
| ASP | Application Service Provider | In English | → Software → Networks, communication |
| ASPI | Advanced SCSI Programming Interface | In English | → Software |
| ASQC | American Society For QUality Control | In English | → Organizations and associations → Quality management |
| ASR | Automated System Recovery | In English | → Computer science |
| ASR | Automatic Speech Recognition = RAP | Reconnaissance Automatique de la Parole | In French |
In English | → Computer-based techniques → Linguistics |
| ASRO | Asociaţia de Standardizare din România | In Romanian | → Standardization → Associations |
| ASSESPRO | Associação das Empresas Brasileiras de Software e Serviços de Informática | In Portuguese | → Software → Associations |
| ASSP | Anti-Spam-SMTP-Proxy | In English | → Networks, communication → 6591 |
| ASWC | Asian Semantic Web Conference | In English | → Congresses → Networks, communication → Semiotics |
| AT | Access and Terminals | In English | → Human-computer interaction → Telecommunications |
| AT&L | Acceptance Test & Logistics | In English | → Maintenance and logistics |
| At2i | Automation Assistance Traçabilité Informatique Industrielle (www.at2i.net) | In French | → Computer science → Mechanical engineering |
| AT2I | Assistance Téléphonie Informatique Internet sur Grenoble (www.groupe-at2i.com) | In French | → Internet → Telecommunications |
| ATA | Analogue Terminals & Access | In English | → Human-computer interaction |
| ATAC | Association Technique pour l'Action Culturelle | In French | → Organizations and associations → Civilization, culture, progress |
| ATAG | Authoring Tool Accessibility Guidelines | In English | → Networks, communication |
| ATALA | Association pour le Traitement Automatique des LAngues (www.atala.org) | In French | → Associations → Computer-based techniques → Linguistics |
| ATAM | Architecture Tradeoff Analysis Method | In English | → Software → Architecture |
| ATC | Advanced Transfer Cache | In English | → Networks, communication → Telecommunications |
| ATC | ATE Computer | In English | → Computer science |
| ATC | Aircraft Target Computer | In English | → Hardware → Aeronautics, aircraft |
| ATC | Action Thématique Concertée | In French | → Management |
| ATCG | Association Technique pour la Certification des Granulats | In French | → Associations → Standardization → Civil engineering → Building |
| ATER | Attaché Temporaire d'Enseignement et de Recherche | In French | → Research policy → Education |
| ATFG | Automatic Test File Generator | In English | → Software |
| ATHIS | Atelier International Histoire et Informatique | In French | → History → Computer science |
| ATI | Aide Tourangelle à l'Innovation | In French | → Regional administration → Engineering, technology → Research policy |
| ATILLA | Association des Technologies Internet et du Logiciel Libre ou Alternatif | In French | → Associations → Software |
| ATIS | Automatic Terminal Information System | In English | → Computer science |
| ATL | Active Template Library | In English | → Computer science |
| ATLAP | AppleTalk Link Access Protocol | In English | → Computer-based techniques → Telecommunications |
| ATM | Adobe Type Manager | In English | → Computer science |
| ATM | Asynchronous Transfer Mode | In English | → Computer science |
| ATS | Automatic Transcribing System | In English | → Computer-based techniques |
| ATU-C | ADSL Transmission Unit at Central Office | In English | → Networks, communication → Telecommunications |
| ATU-R | ADSL Transmission Unit for Resident | In English | → Networks, communication → Telecommunications |
| ATu2L | Association Tunisienne des Logiciels Libres | In French | → Associations → Software |
| AU | Access Unit | In English | → Computer science |
| AUFO | Association des Utilisateurs Français d'Oracle | In French | → Programming languages → Organizations and associations |
| AUI | Asociación Española de Usuarios de Internet | In Spanish | → Associations → Networks, communication |
| AURIF | Association des Utilisateurs de Réseaux Informatiques en Île-de-France | In French | → Networks, communication → Associations → Telecommunications |
| AURP | AppleTalk Update-Based Routing Protocol | In English | → Networks, communication → Telecommunications |
| AUTODIN | Automatic Digital Network | In English | → Computer science |
| AUTOVON | Automatic Voice Network | In English | → Computer science |
| AV | Audiovisual | In English | → Graphical processing → Image processing → Cinema, movies |
| AV | Access Violation | In English | → Networks, communication → Telecommunications |
| AVALON | Acquisition and Validation of Ontologies | In English | → Data |
| AVC | Advanced Video Coding | In English | → Computer-based techniques |
| AVI | Audio Video Interleaved | In English | → Computer-based techniques |
| AVI | Association for Veterinary Informatics (http://avinformatics.org) | In English | → Associations → Computer science → Veterinary medicine |
| AVM | ATM Voice Multiplexer | In English | → Computer-based techniques |
| AVS | Advanced Visual Systems | In English | → Software |
| AWIS | African Water Information (and Documentation) System = SADIEau | Système Africain de Documentation et d'Information sur l'Eau | In French |
In English | → Knowledge management → Hydrology → 626 → Environmental technology, water supply, waste management |
| AWT | Abstract Windowing Toolkit | In English | → Software |
| AXUL | Association aiXoise des utilisateurs de Linux et des logiciels libres | In French | → Associations → Software → Operating systems |
| AZS | Azərbaycan Respublikasının Standartlaşdırma, Metrologiya və Patent üzrə Dövlət Agentliyi | In Azerbaijani | → Standardization |
| BA | Behaviour Aggregate | In English | → Networks, communication → Telecommunications |
| BA | Besoin d’Amélioration | In French | → Quality management |
| BAIT | Bulgarian Association of Information Technologies | In English | → Associations → Computer science → Telecommunications |
| BASE | Bielefeld Academic Search Engine | In English | → Software → Networks, communication |
| BASIC | Beginner's All-purpose Symbolic Instruction Code | In English | → Programming languages |
| BASS | Backup Avionics System Software | In English | → Software → Aeronautics, aircraft |
| BBS | Bulletin Board System | In English | → Networks, communication → Telecommunications |
| BC | Binary Counter | In English | → Computer science |
| BC | Bus Coupler | In English | → Computer science |
| BCB | Backbone Core Bridge | In English | → Networks, communication → Telecommunications |
| BCD | Binary-Coded Data | In English | → Computer science |
| BCH | Binary-Coded Hexadecimal | In English | → Computer science |
| BCI | Brain-Computer Interface | In English | → Human-computer interaction |
| BCM | Business Contact Manager | In English | → Software |
| BCRD | Budget Civil de Recherche et de Développement | In French | → Research policy → Finance → Engineering, technology |
| BCS | Basic Content Services | In English | → Document processing → Knowledge management |
| BCVA | Belgian Veterinary Computer Association | In English | → Associations → Computer science → Veterinary medicine |
| BD | Banque de Données = DB | Data Base | In English |
In French | → Data |
| BDT | Block Data Transfer | In English | → Computer science |
| BDT | Banque de Données sur le Territoire | In French | → Knowledge management → Regional planning |
| BDU | Banque de Données Urbaines | In French | → Knowledge management → Regional planning |
| BEAB | British Electrotechnical Approvals Board | In English | → Standardization → Mechanical engineering → Electrical engineering |
| BEP | Büro für Europäische Programme | In German | → Research policy |
| BER | Bit Error Rate | In English | → Computer science |
| BFC | Backup Flight Computer | In English | → Hardware → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| BFO | Basic Formal Ontology | In English | → Programming languages → Libraries |
| BFS | Backup Flight Software | In English | → Software → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| BFSS | Backup Flight Software System | In English | → Software → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| BGP | Border Gateway Protocol | In English | → Internet |
| BIA | Bus Interface Adapter | In English | → Human-computer interaction |
| BiblioML | Bibliographic Markup Language | In English | → Libraries → Data |
| BIC | Bus Interface Controller | In English | → Human-computer interaction |
| BII | Bioinformatics Institute | In English | → Research institutes → Computer science → Building |
| BIML | Bureau International de Métrologie Légale | In French | → Standardization |
| BIN | Belgisch Instituut voor Normalisatie | In Dutch | → Standardization |
| BIOS | Basic Input/Output System | In English | → Operating systems |
| BIPM | Bureau Internacional de Pesos e Medidas (www.bipm.org) = BIPM | Bureau International des Poids et Mesures | In French = IBMG | Internationales Büro für Maß und Gewicht | In German = BIPM | Buroo Internacia pri Pezoj kaj Mezuroj | In Esperanto |
In Portuguese | → Standardization |
| BIPM | Buroo Internacia pri Pezoj kaj Mezuroj (www.bipm.org) = IBMG (look above) |
In Esperanto | → Standardization |
| BIPM | Bureau International des Poids et Mesures (www.bipm.org) = IBMG (look above) |
In French | → Standardization |
| BIS | Buildings Information System | In English | → Knowledge management → Building |
| BIS | Bureau of Indian Standards | In English | → Standardization |
| BISFA | Bureau International pour la Standardisation des Fibres Artificielles | In French | → Standardization → Textile industry |
| BIT | Bereich für Internationale Forschungs- und Technologiekooperation | In German | → Research policy → Engineering, technology |
| BIT | Behaviour & Information Technology | In English | → Serial publications, periodicals → Psychology → Computer science |
| BIU | Bus Interface Unit | In English | → Computer science |
| BIU | Buffer Interface Unit | In English | → Computer science |
| BLAS | Basic Linear Algebra Subprograms | In English | → Software → Algebra |
| BM | Bench Maintenance | In English | → Maintenance and logistics |
| BMAT | Barcelona Music and Audio Technologies | In English | → Computer-based techniques → Music |
| BMB | Bench Maintenance Building | In English | → Maintenance and logistics |
| BMB | Base Maintenance Building | In English | → Maintenance and logistics |