| @LIS | Alliance for the Information Society | In English | → Computer science → Telecommunications |
| A&EM | Assembly and External Maintenance | In English | → Engineering, technology → Maintenance and logistics |
| A&PS | Administration and Program Support | In English | → Management |
| AA | Associate Administrator | In English | → Management |
| AAAI | American Association for Artificial Intelligence (www.aaai.org) | In English | → Associations → Artificial intelligence |
| AAC | Advanced Audio Coding | In English | → Data |
| AADW | American Association of Dental Webmasters | In English | → Internet → Associations → Dentistry |
| AAFDP | Association Aux Frontières Du Pixel | In French | → Associations → Computer-based techniques → Arts |
| AAFS | Activate Arabic Form Shaping | In English | → Writing systems → Document processing |
| AAHAM | American Association of Health Care Administrative Management | In English | → Associations → Medicine → Management |
| AAHC | American Association for History and Computing | In English | → Associations → Computer science → History |
| AAIM | Asociación Argentina de Informática Médica | In Spanish | → Computer science → Associations → Medicine |
| AAIM | Association for Applied Interactive Multimedia | In English | → Associations → Computer science → Telecommunications |
| AAM | Association des Auteurs Multimédias | In French | → Associations → Computer science → Arts |
| AAMA | American Academy of Medical Administrators | In English | → Academies → Medicine → Management |
| AAMP | Advanced Architecture Microprocessor | In English | → Hardware |
| AAMSI | American Association for Medical Systems and Informatics | In English | → Associations → Computer science → Medicine |
| AAP | Administrative Acceptability Procedure | In English | → Quality management → Public administration, government |
| AAPA | American Association of Psychiatric Administrators | In English | → Associations → Management → Psychiatry |
| AAQTE | Association pour l'Assurance Qualité en Thérapeutique et l'Évaluation | In French | → Associations → Quality management → Pharmacology, toxicology |
| AAR | Archives Audiovisuelles de la Recherche | In French | → Libraries → Research policy |
| AARLIN | Australian Academic and Research Library Network | In English | → Research policy → Libraries → Higher education, universities |
| AARP | AppleTalk Address Resolution Protocol | In English | → Computer science |
| AAT | Application Assembly Tool | In English | → Software |
| AAT | Apple Advanced Typography | In English | → Writing systems → Computer science |
| AAVI | American Academy of Veterinary Informatics | In English | → Academies → Veterinary medicine → Computer science |
| AB3L | Association Béninoise pour la Promotion de Linux et des Logiciels Libres | In French | → Associations → Operating systems |
| ABAP | Advanced Business Application Programming | In English | → Software → Computer-based techniques |
| ABERT | Auto Bit Error Rate Test | In English | → Computer science |
| ABI | Avionics Bus Interface | In English | → Human-computer interaction → Aeronautics, aircraft |
| ABI | Application Binary Interface | In English | → Computer science |
| ABI | Adaptive Brain Interfaces | In English | → Human-computer interaction → Neurology |
| ABN | Algemeen Beschaafd Nederlands | In Dutch | → Standardization |
| ABNT | Associação Brasileira de Normas Técnicas | In Portuguese | → Associations → Standardization |
| ABRET | Association Bretonne pour la Recherche et la Technologie | In French | → Research policy → Associations → Engineering, technology |
| ABUL | Association Bordelaise des Utilisateurs de Logiciels libres | In French | → Associations → Software → Operating systems |
| AC | Auxiliary Computer | In English | → Hardware |
| AC3L | Association Camerounaise des utilisateurs de Linux et des Logiciels Libres | In French | → Associations → Operating systems |
| ACA | American Culture Association | In English | → Associations → Civilization, culture, progress → Language, linguistics, literature |
| ACA | Agents Conversationnels Animés | In French | → Software |
| ACACIA | Acquisition des Connaissances pour l'Assistance à la Conception par Interaction entre Agents | In French | → Computer science → Knowledge management |
| ACCT | Agence de Coopération Culturelle et Technique | In French | → Civilization, culture, progress → Applied sciences, technology |
| ACF | Application Configuration File | In English | → Computer science |
| ACF | Advanced Computer Feasability | In English | → Computer science |
| ACF | Augsburger Computer Forum | In German | → 006 → Computer science |
| ACIF | Academia Cultural Inglesa Florida | In Spanish | → Academies → Civilization, culture, progress |
| ACIF | Association Culturelle Internationale Francophone | In French | → Associations → Civilization, culture, progress |
| ACL | Appletalk Class Library | In English | → Software |
| ACM | Association Of Computing Machinery | In English | → Computer science → Organizations and associations |
| ACM | Auxiliary Core Memory | In English | → Memories |
| ACML | AMD Core Math Library | In English | → Programming languages → Mathematics |
| ACPI | Advanced Configuration and Power Integration | In English | → Computer science → Electrical engineering |
| ACPR | Association Culturelle Paul Renotte | In French | → Associations → Civilization, culture, progress |
| ACR | Advanced Character Recognition | In English | → Writing systems → Document processing |
| ACR | Austrian Cooperative Research (www.acr.at) | In English | → Research policy → Engineering, technology |
| ACTE | Approvals Committee for Terminal Equipment | In English | → Quality management → Engineering, technology |
| ADADL | ADA Design And Documentation Language | In English | → Programming languages |
| ADAE | Agence de Développement de l'Administration Électronique | In French | → Public administration, government → Computer science → Telecommunications |
| ADAM | ALEPH Digital Asset Module | In English | → Libraries → Software |
| adass | Astronomical Data Analysis Software and Systems | In English | → Serial publications, periodicals → Astronomy → Software |
| ADB | Auxiliary Memory Data Output Bus | In English | → Memories → Data |
| ADB | Apple Desktop Bus | In English | → Software |
| ADC | Analoog-Digitaal Converter = ADC | Analog-To-Digital Converter | In English |
In Dutch | → Computer science → Electrical engineering |
| ADC | Analog-To-Digital Computer | In English | → Computer science → Electrical engineering |
| ADC | Analog-To-Digital Converter = (look above) |
In English | → Computer science → Electrical engineering |
| ADC | Air Data Computer | In English | → Hardware |
| AdCoM | Advances in Computational Mathematics | In English | → Serial publications, periodicals → Mathematics → Computer science |
| ADD | Apple Data Detectors | In English | → Software |
| ADDNB | Association pour le Développement des Documents Numériques en Bibliothèque | In French | → Associations → Libraries → Knowledge management |
| ADELI | Association pour la maîtrise des systèmes d'information | In French | → Computer science → Knowledge management |
| ADELLA | Association pour le Développement des Logiciels Libres dans l'Aude | In French | → Associations → Software |
| ADER | Association pour le Développement et la Recherche | In French | → Research policy → Associations |
| ADF | Automatic Document Feeder | In English | → Document processing |
| ADI | Agence de l'informatique | In French | → Computer science |
| ADIASC | Association pour le Développement d'un Internet Associatif Solidaire et Citoyen | In French | → Associations → Internet → Telecommunications |
| ADIJ | Association pour le Développement de l'Informatique Juridique | In French | → Computer science → Organizations and associations → Law, jurisprudence |
| ADIL | Association pour le Développement de L'Informatique Libre | In French | → Associations → Software |
| ADIPH | Association pour le Développement de l'Internet en Pharmacie Hospitalière | In French | → Associations → Networks, communication → Pharmacology, toxicology |
| ADME | Association of Destination Management Executives | In English | → Associations → Management |
| ADMS | Automated Data Management System | In English | → Data |
| ADN | Autodesk Developer Network | In English | → Computer-based techniques → Engineering, technology |
| ADNX | Association pour la Documentation Numérique en XML | In French | → Programming languages → Libraries → Associations |
| ADO | ActiveX Data Objects | In English | → Computer science |
| ADOP | Advanced Distributed On-board Processor | In English | → Hardware |
| ADP | Automated/Automatic Data Processing | In English | → Data |
| ADPCM | Adaptive Differential Pulse Code Modulation | In English | → Computer science → Telecommunications |
| ADPE | Automated/Automatic Data Processing Equipment | In English | → Hardware → Data |
| ADPF | Automated Data Processing Facility | In English | → Data |
| ADR | Automatic Dialogue Replacement | In English | → Computer-based techniques → Cinema, movies |
| ADRI | Agence pour le Développement des Relations Interculturelles | In French | → Civilization, culture, progress |
| ADS | Alternate Data Stream | In English | → Data |
| ADS | Attitude Display System | In English | → Human-computer interaction → Spaceflight engineering, astronautics |
| ADSI | Active Directory Services Interface | In English | → Computer science |
| ADSIB | Agencia para el Desarrollo de la Sociedad de la Información en Bolivia | In Spanish | → Computer science → Telecommunications |
| ADSL | Asymmetric Digital Subscriber Line | In English | → Networks, communication |
| ADSL | Association des Surfeurs Lésés | In French | → Internet → Associations |
| ADSL-G | Association des surfeurs lésés de Guyane | In French | → Associations → Networks, communication → Telecommunications |
| ADSP | AppleTalk Data Stream Protocol | In English | → Computer science → Telecommunications |
| ADT | Abstract Data Type | In English | → Data |
| ADV | Arbeitsgemeinschaft für Datenverarbeitung | In German | → Associations → 00462 |
| AEC | Ars Electronica Center | In English | → Computer science → Arts → Electronics |
| AEM | Assembly and External Maintenance | In English | → Maintenance and logistics |
| AENOR | Asociación Española de Normalización y Certificación | In Spanish | → Associations → Standardization → Quality management |
| AEOM | AppleEvent Object Model | In English | → Computer science |
| AERFAI | Asociación Española de Reconocimientos de Formas y Análisis de Imágenes (www.aerfai.org) | In Spanish | → Associations → Graphical processing → Image processing |
| AES | Advanced Encryption Standard | In English | → Computer science → Mathematics |
| AF | Assured Forwarding | In English | → Networks, communication → Telecommunications |
| AF | Anisotropische Filtering | In Dutch | → Computer-based techniques |
| AFA | Association des Fournisseurs d'Accès | In French | → Internet → Associations → Telecommunications |
| AFALD | Air Force Acquisition Logistics Division | In English | → 358 → Maintenance and logistics |
| AFAQ | Association Française pour l’Assurance de la Qualité (www.afaq.org) | In French | → Associations → Quality management |
| AFD | Advanced Formating Device | In English | → Document processing |
| AFD | Acceptance For Data | In English | → Data |
| AFDESI | Association Française des Développeurs, Éditeurs et Fournisseurs de Services en télévision Interactive (www.afdesi.org) | In French | → Associations → Networks, communication → Telecommunications |
| AFE | Alfabet Fonetike Eternåcionå = AFI | Alfabetul Fonetic Internaţional | In Romanian = LFE | Lizherenneg Fonetikel Etrebroadel | In Breton = МФА | Международната фонетична азбука | In Bulgarian = IPA | Internationales Phonetisches Alphabet | ALS = 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 = IFA | Internationoal Fonetisch Alfabet | VLS = AFN | Alfabeti Fonetik Ndërkombëtar | SQ |
In Walloon | → Writing systems |
| AFI | Alfabetul Fonetic Internaţional = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Romanian | → Writing systems |
| AFI | Alfabet fonètic internacional = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Catalan | → Writing systems |
| AFI | Alfabeto Fonético Internacional = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Spanish | → Writing systems |
| AFI | Alfabeto Fonético Internacional = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Galician | → Writing systems |
| AFI | Alfabet fonetic internacionau = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Occitan | → Writing systems |
| AFI | Alfabeto Fonetico Internazionale = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Italian | → Writing systems |
| AFI | Alfabeto Fonético Internacional = AFE, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF, AFN (look above) |
In Portuguese | → Writing systems |
| AFI | Association Fête de l'Internet | In French | → Internet → Associations |
| AFIA | Association Française pour l'Intelligence Artificielle | In French | → Associations → Artificial intelligence |
| AFIM | Association Française de l'Internet Mobile | In French | → Internet → Associations → Telecommunications |
| AFJV | Agence Française pour le Jeu Vidéo (www.afjv.com) | In French | → Software → Entertainment |
| AFLC | Air Force Logistics Command | In English | → Maintenance and logistics → 358 |
| AFME | Association Francophone de Management Électronique | In French | → Organizations and associations → Knowledge management |
| AFN | Alfabeti Fonetik Ndërkombëtar = AFE, AFI, LFE, МФА, IPA, IFA, ΔΦΑ, API, NAF (look above) |
[SQ] | → Writing systems |
| AFNET | Association Francophone des utilisateurs du NET, du e-business et de la société en réseau | In French | → Networks, communication → Associations → Trade → 65 |
| AFNIC | Association Française pour le Nommage Internet en Coopération | In French | → Internet → Associations → Telecommunications |
| AFNOR | Association Francaise de Normalisation | In French | → Standardization → Associations |
| AFORM | Association Française des Opérateurs de Réseaux Multiservices | In French | → Networks, communication → Associations → Telecommunications |
| AFRIF | Association Française pour la Reconnaissance et l'Interprétation des Formes | In French | → Associations → Computer-based techniques |
| AFRS | Association Française des Revendeurs Spécialisés (www.afrs.fr) | In French | → Associations → Trade → Software → Entertainment |
| AFS | Air Force Standard | In English | → Standardization → 358 |
| AFU | African Virtual University | In English | → Networks, communication → Higher education, universities |
| AFUL | Association Francophone des Utilisateurs de Linux et des Logiciels Libres | In French | → Programming languages → Operating systems → Organizations and associations |
| AFUP | Association Francaise des Utilisateurs de PHP | In French | → Programming languages → Organizations and associations |
| AFUTT | Association Française des Utilisateurs des Télécommunications | In French | → Associations → Networks, communication → Telecommunications |
| AFUU | Association Francaise des Utilisateurs d'Unix | In French | → Associations → Operating systems |
| AG3L | Association Gabonaise des utilisateurs de Linux et des Logiciels Libres | In French | → Associations → Operating systems |
| AGDIL | Association Guadeloupéenne pour le Développement de l'Informatique Libre | In French | → Associations → Software |
| AGL | Association du Génie Logiciel | In French | → Software → Organizations and associations |
| AGP | Accelerated Graphics Port | In English | → Graphical processing → Image processing |
| AGU | Address Generation Unit | In English | → Computer science |
| AGU3L | Association Grufféenne des Utilisateurs de Linux et des Logiciels Libres | In French | → Associations → Software → Operating systems |
| AHA | Accelerated Hub Architecture | In English | → Networks, communication |
| AI | Artefarita Inteligenteco = AI | Artificial Intelligence | In English = AI | Artificiële Intelligentie | In Dutch = KI | Kunstmatige Intelligentie | In Dutch = VI | Vještačka inteligencija | In Bosnian = IA | Intelligència artificial | In Catalan = KI | Künstliche Intelligenz | In German = IA | Intelligence Artificielle | In French |
In Esperanto | → Artificial intelligence |
| AI | Artificiële Intelligentie = KI, VI, IA (look above) |
In Dutch | → Artificial intelligence |
| AI | Artificial Intelligence = KI, VI, IA (look above) |
In English | → Artificial intelligence |
| AI*IA | Associazione Italiana per l'Intelligenza Artificiale | In Italian | → Associations → Artificial intelligence |
| AI-IA | Associazione Italiana per l'Intelligenza Artificiale | In Italian | → Associations → Artificial intelligence |
| AI3L | Association Ivoirienne pour Linux et les Logiciels Libres | In French | → Associations → Operating systems |
| AIC | Application Integration Components | In English | → Computer science |
| AICF | Associazione Culturale Italo-Francese | In Italian | → Associations → Civilization, culture, progress |
| AIDS | Airborne Integrated Data System | In English | → Data → Aeronautics, aircraft |
| AIE | Asociación Iberoamericana de Ergonomía | In Spanish | → Associations → Human-computer interaction |
| AIF | Auto Increment Field | In English | → Data |
| AiF | Arbeitsgemeinschaft industrieller Forschungsvereinigungen | In German | → Research policy → Associations |
| AIFB | (Institut für) Angewandte Informatik und Formale Beschreibungsverfahren | In German | → Computer science |
| AIFF | Audio Interchange File Format | In English | → Computer-based techniques → Telecommunications |
| AII | Agence de l'Innovation Industrielle | In French | → Research policy → Industry, industrial policy → Engineering, technology |
| AIIM | Association for Information and Image Management | In English | → Organizations and associations → Graphical processing → Knowledge management |
| AIKE | Artificial and Knowledge Engineering Group | In English | → Artificial intelligence → Knowledge management |
| AIL | Association Isépienne du Libre | In French | → Associations → Software |
| AILF | Association des Informaticiens de Langue Française | In French | → Associations → Computer science |
| AILS | Ames Imaging Library Server | In English | → Graphical processing → Image processing |
| AILS | Association Informatique Libre et Santé | In French | → Associations → Software → Medicine |
| AIMSUN2 | Advanced Interactive Microscopic Simulator for Urban and Non-Urban Networks | In English | → Computer simulation → Transport and postal services |
| AIPO | Asociación Interacción Persona-Ordenador | In Spanish | → Associations → Human-computer interaction |
| AIST | Agency of Industrial Science and Technology | In English | → Research policy → Engineering, technology |
| AIT | Association des Internautes Territoriaux | In French | → Internet → Associations |
| AIU | Abort Interface Unit | In English | → Human-computer interaction |
| AIU | Avionics Interface Unit | In English | → Human-computer interaction → Aeronautics, aircraft |
| AIVET | Austrian Institute for Virtual Education Techniques | In English | → Computer-based techniques → Education |
| AIXM | Aeronautical Information eXchange Model | In English | → Software → Aeronautics, aircraft |
| AJAX | Asynchronous JavaScript And XML | In English | → Software |
| AJPIII | All Junky Pages Intentionally Illogical & Inconsistent | In English | → Networks, communication |
| ALADIN | Amis de Linux & Amis du Développement sur INternet | In French | → Organizations and associations → Software → Networks, communication |
| ALC | Air Logistics Center | In English | → Maintenance and logistics → Transport and postal services |
| ALER | Allocataire d'Enseignement et de Recherche | In French | → Research policy → Education |
| ALGOL | Algorithmic Language | In English | → Programming languages |
| ALICE | America Latina Interconectada Con Europa | In Spanish | → Networks, communication |
| ALIS | Association Linux et Informatique Souss | In French | → Associations → Operating systems |
| ALL | Association pour le Logiciel Libre | In French | → Associations → Software |
| ALL | Alkalmazott Logikai Laboratórium = ALL | Applied Logic Laboratory | In English |
In Hungarian | → Research institutes → Computer science |
| ALL | Applied Logic Laboratory = (look above) |
In English | → Research institutes → Computer science |
| ALM | Architectures Logicielles et Matérielles | In French | → Hardware → Software |
| ALMA | Arabic Language Multilingual Application | In English | → Software → Language, linguistics, literature |
| ALMS | Automated Logistics Management System | In English | → Maintenance and logistics |
| ALOLISE | Association pour la promotion des LOgiciels LIbres de Saint-Étienne | In French | → Associations → Software |
| ALP | Access Linux Platform | In English | → Networks, communication → Telecommunications |
| ALS | Advanced Logistics System | In English | → Maintenance and logistics |
| ALS | Ada Language System | In English | → Programming languages |
| ALSSW | ALS Software | In English | → Software |
| ALTW | Australasian Language Technology Workshop | In English | → Computer-based techniques → Language, linguistics, literature |
| ALU | Arithmetic/Logic Unit | In English | → Computer science → Mathematics |
| ALV | Advanced Logistics Vehicle | In English | → Maintenance and logistics → Vehicle engineering |
| AM | Ante meridiem | In Latin | → 006 |