| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| 2FA | Two-Factor Authentication | In English | → Telecommunications | 
| A&RC | Application and Resource Control | In English | |
| A2S | Amazon Associates Web Service | In English | → Internet | 
| AAT | Application Assembly Tool | In English | |
| AB3L | Association Béninoise pour la Promotion de Linux et des Logiciels Libres | In French | → Associations → Operating systems  | 
| ABAP | Advanced Business Application Programming | In English | → Computer-based techniques | 
| ABEL | Advanced Boolean Expression Language | In English | → Programming languages → Computer hardware  | 
| ABUL | Association Bordelaise des Utilisateurs de Logiciels libres | In French | → Associations → Operating systems  | 
| AC3L | Association Camerounaise des utilisateurs de Linux et des Logiciels Libres | In French | → Associations → Operating systems  | 
| ACA | Agents Conversationnels Animés | In French | |
| ACAP | Advanced Computer Airframe Program | In English | → Computer programs → Aeronautics, aircraft  | 
| ACF | Application Configuration File | In English | → Files | 
| ACL | Appletalk Class Library | In English | |
| ACM-SIGOPS | Association for Computing Machinery - Special Interest Group on Operating Systems | In English | → Organizations and associations → Computer science → Operating systems  | 
| ACML | AMD Core Math Library | In English | → Programming languages → Mathematics  | 
| ACP | Airline Control Program | In English | → Operating systems → Computer science → Transport by air  | 
| ACROSS | Autonomous Control for a Reliable Internet of Services | In English | → Networks, communication | 
| ACT | Anti-Clogging Token | In English | |
| ADADL | ADA Design And Documentation Language | In English | → Programming languages | 
| ADAM | ALEPH Digital Asset Module | In English | → Libraries | 
| ADAM | Audit Data Analysis and Mining | In English | |
| ADAP | Aerodynamic Data Analysis Program | In English | → Computer programs → Aerodynamics  | 
| ADAP | Automated Data Analysis Program | In English | → Computer programs → Data  | 
| adass | Astronomical Data Analysis Software and Systems | In English | → Data processing → Astronomy  | 
| ADD | Apple Data Detectors | In English | → Operating systems | 
| ADELLA | Association pour le Développement des Logiciels Libres dans l'Aude | In French | → Associations | 
| ADFS | Advanced Disc Filing System | In English | → Operating systems | 
| ADIL | Association pour le Développement de L'Informatique Libre | In French | → Associations | 
| ADK | Additional Decryption Key | In English | |
| ADL | ADA Design Language | In English | → Programming languages | 
| ADL | ADA-Based Design Language | In English | → Programming languages | 
| ADNX | Association pour la Documentation Numérique en XML (http://adnx.org) | In French | → Programming languages → Documentation → Associations  | 
| ADO | ActiveX Data Objects | In English | |
| ADSI | Active Directory Service Interface | In English | |
| ADTS | Application Development Tool Set | In English | |
| ADULLACT | Association des Développeurs et Utilisateurs de Logiciels Libres pour les Administrations et les Collectivités Territoriales (www.adullact.org) | In French | → Associations → Public administration, government  | 
| ADVISE | Analysis, Dissemination, Visualization, Insight, and Semantic | In English | |
| AFDESI | Association Française des Développeurs, Éditeurs et Fournisseurs de Services en télévision Interactive (www.afdesi.org) | In French | → Associations → Networks, communication → Telecommunications → France  | 
| AFJV | Agence Française pour le Jeu Vidéo (www.afjv.com) | In French | → Organizations and associations → Entertainment → France  | 
| AFPY | Association Francophone PYthon (http://afpy.org) | In French | → Associations → Programming languages  | 
| AFR | Alternate Frame Rendering | In English | |
| AFRS | Association Française des Revendeurs Spécialisés (www.afrs.fr) | In French | → Associations → Trade → Entertainment → France  | 
| AFUL | Association Francophone des Utilisateurs de Linux et des Logiciels Libres (www.aful.org) | In French | → Associations → Programming languages → Operating systems  | 
| AFUP | Association Française des Utilisateurs de PHP (www.afup.org) | In French | → Associations → Programming languages → France  | 
| AFUU | Association Française des Utilisateurs d'Unix | In French | → Associations → Operating systems → France  | 
| 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 | 
| AGDREF | Application de Gestion des Dossiers des Ressortissants Étrangers en France | In French | → Public administration, government → France  | 
| AGL | Association du Génie Logiciel | In French | → Associations | 
| AGU3L | Association Grufféenne des Utilisateurs de Linux et des Logiciels Libres | In French | → Associations → Operating systems  | 
| AHDL | Altera Hardware Description Language | In English | → Programming languages → Computer hardware  | 
| AI3L | Association Ivoirienne pour Linux et les Logiciels Libres | In French | → Associations → Operating systems  | 
| AIGLON | Aide Informatique à la Gestion Locale des Organismes Nationaux | In French | |
| AIL | Association Isépienne du Libre | In French | → Associations | 
| AILS | Association Informatique Libre et Santé | In French | → Associations → Medicine  | 
| AIX | Advanced Interactive eXecutive | In English | → Operating systems | 
| AIXM | Aeronautical Information eXchange Model | In English | → Aeronautics, aircraft | 
| AJAX | Asynchronous JavaScript And XML | In English | |
| ALADIN | Amis de Linux & Amis du Développement sur INternet | In French | → Organizations and associations → Operating systems → Internet  | 
| ALGOL | Algorithmic Language | In English | → Programming languages → Algorithms  | 
| ALGUE | Aide Logicielle à la Gestion des Unités et des Établissements | In French | |
| ALICE | Artificial Linguistic Internet Computer Entity | In English | → Artificial intelligence | 
| ALIS | Association Linux et Informatique Souss | In French | → Associations → Operating systems  | 
| ALL | Association pour le Logiciel Libre | In French | → Associations | 
| ALM | Architectures Logicielles et Matérielles | In French | → Computer hardware | 
| ALMA | Arabic Language Multilingual Application | In English | → Language, linguistics, literature | 
| ALOLISE | Association pour la promotion des LOgiciels LIbres de Saint-Étienne | In French | → Associations | 
| ALS | Ada Language System | In English | → Programming languages | 
| ALSSW | ALS Software | In English | |
| AMI | Amazon Machine Image | In English | → Internet | 
| AMJ | Association du Multimédia Jeunesse (www.amj.asso.fr) | In French | → Associations → France  | 
| 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 → Computer science → Operating systems  | 
| ANIS | Asociaţia Naţională a Industriei de Software şi Servicii din România | In Romanian | → Associations → Telecommunications → Romania  | 
| AOCE | Apple Open Collaboration Environment | In English | |
| AOCP | AVCS On-Board Computer Program | In English | → Computer programs | 
| AOSD | Aspect-Oriented Software Development | In English | |
| APA | Abort Programmer Assembly | In English | → Astronautics | 
| APC | Asynchronous Pool Cleaning | In English | |
| APD | Advanced PHP Debugger | In English | → Programming languages | 
| APE | Analyses of Phylogenetics and Evolution | In English | → Biotechnology → Genetics → Enzymes  | 
| API | Application Programming Interface | In English | → Networks, communication | 
| API | Application Program Interface | In English | → Networks, communication | 
| APIDS | Application Protocol-based Intrusion Detection System | In English | |
| APL | Applications Program Library | In English | → Libraries | 
| APL | A Pattern Language | In English | |
| APL | A Programming Language | In English | → Programming languages | 
| APLM | Applications Program Library Maintenance | In English | → Libraries | 
| APM | Application Performance Management | In English | |
| APM | Alternative PHP Monitor | In English | → Programming languages | 
| APOM | Association des Producteurs d'Oeuvres Multimédia (www.apom.org) | In French | → Associations → Arts  | 
| APP | Agence de Protection des Programmes (http://app.legalis.net) | In French | → Industrial property | 
| APPC | Advanced Program-to-Program Communications | In English | → Computer programs → Networks, communication  | 
| APPEL | A P3P Preference Exchange Language | In English | |
| APRIL | Association pour la Promotion et la Recherche en Informatique Libre (www.april.org) | In French | → Associations | 
| ARAP | AppleTalk Remote Access Protocol | In English | → Networks, communication | 
| ARC | ALEPH Reporting Center | In English | → Organizations and associations → Libraries  | 
| ARDOISE | Application de Recueil de la Documentation Opérationnelle et d'Information Statistique sur les Enquêtes | In French | → Documentation → Police  | 
| AROS | Automotive Robust Operating Services | In English | → Operating systems → Electronics  | 
| ARS | Airline Reservation System | In English | → Transport by air → Tourism  | 
| ART | Automated Reasoning Tool | In English | → Artificial intelligence | 
| ASA | Adaptive Server Anywhere | In English | → Networks, communication | 
| ASF | ACM-SIGOPS France | In French | → Organizations and associations → Computer science → Operating systems  | 
| ASFP | askSam File Pointer | In English | → Files | 
| ASJR | Association des Salles de Jeux en Réseau (www.asjr.net) | In French | → Associations → Entertainment  | 
| ASN.1 | Abstract Syntax Notation One | In English | → Programming languages | 
| ASP | Active Server Pages | In English | → Networks, communication | 
| ASP | Application Service Provider | In English | → Networks, communication | 
| ASPI | Advanced SCSI Programming Interface | In English | |
| ASSESPRO | Associação das Empresas Brasileiras de Software e Serviços de Informática | In Portuguese | → Associations → Brazil  | 
| ASTER | Analyses des Structures et Thermo-mécanique pour des Études et des Recherches | In French | → Physics | 
| ATAM | Architecture Tradeoff Analysis Method | In English | → Architecture | 
| ATFG | Automatic Test File Generator | In English | → Files | 
| ATILLA | Association des Technologies Internet et du Logiciel Libre ou Alternatif | In French | → Associations → Internet  | 
| ATOLL | Acceptance, Test Or Launch Language | In English | → Programming languages → Quality management → Astronautics  | 
| ATOM | Application de Trésorerie des Opérations de Marché | In French | → Finance | 
| ATS | Address Translation Services | In English | → Memories | 
| ATu2L | Association Tunisienne des Logiciels Libres | In French | → Associations → Tunisia  | 
| AUFO | Association des Utilisateurs Français d'Oracle (www.aufo.asso.fr) | In French | → Associations → Data → France  | 
| AVS | Advanced Visual Systems | In English | |
| AVVID | Architecture for Voice, Video and Integrated Data | In English | → Data | 
| AWT | Abstract Windowing Toolkit | In English | |
| AXS | Authentication by eXtraction and Synchronization | In English | |
| AXUL | Association aiXoise des utilisateurs de Linux et des logiciels libres | In French | → Associations → Operating systems  | 
| BAFTA | British Academy of Film and Television Arts (www.bafta.org) | In English | → Academies → Cinema, movies → Telecommunications → United Kingdom  | 
| BAL | Boîte Aux Lettres | In French | |
| BASE | Bielefeld Academic Search Engine | In English | → Networks, communication | 
| BASE | BioArray Software Environment | In English | → Genetics → Biotechnology  | 
| BASIC | Beginner's All-purpose Symbolic Instruction Code | In English | → Programming languages | 
| BASIC | Beginners All-purpose Symbolic Instruction Code | In English | → Programming languages | 
| BASS | Backup Avionics System Software | In English | → Aeronautics, aircraft | 
| BBS | Bulletin Board System | In English | → Networks, communication | 
| BCEL | Byte Code Engineering Library | In English | → Programming languages | 
| BCL | Botnet Controller List | In English | → Networks, communication → Computer infections  | 
| BCM | Business Contact Manager | In English | |
| BCPL | Basic Combined Programming Language | In English | → Programming languages | 
| BCS | Business Connectivity Services | In English | |
| BCU | BIOS Configuration Utility | In English | |
| BDC | Business Data Catalog | In English | |
| BDE | Borland Database Engine | In English | → Databases | 
| BDOS | Basic Disk Operating System | In English | → Operating systems | 
| BeIA | Be's Internet Appliance | In English | → Internet | 
| BFO | Basic Formal Ontology | In English | → Programming languages → Libraries  | 
| BFS | Backup Flight Software | In English | → Aeronautics, aircraft → Astronautics  | 
| BFSS | Backup Flight Software System | In English | → Aeronautics, aircraft → Astronautics  | 
| BHO | Browser Helper Object | In English | → Internet | 
| BIND | Berkeley Internet Name Daemon | In English | → Internet | 
| BIND | Berkeley Internet Name Domain | In English | → Internet | 
| BIOS | Basic Input/Output System | In English | → Operating systems | 
| BIOS | Basic Input Output System | In English | → Operating systems | 
| BISON | Buffalo Information System Online | In English | → Higher education, universities | 
| BLAS | Basic Linear Algebra Subprograms | In English | → Algebra | 
| BLAST | Basic Local Alignment Search Tool | In English | → Biotechnology | 
| BMIDE | Business Modeler Integrated Development Environment | In English | |
| BNML | Business Narrative Markup Language | In English | → Programming languages → Economics  | 
| BOCC | Big Oxford Computer Company (www.bocc.co.uk) | In English | → Networks, communication → United Kingdom  | 
| BOS | Base Operating System | In English | → Operating systems | 
| BPF | Berkley Packet Filter | In English | → Networks, communication | 
| BPML | Business Process Modelling Language | In English | → Programming languages → Economics  | 
| BPML | Business Process Management Language | In English | → Programming languages → Data  | 
| BPML | Business Process Markup Language | In English | → Programming languages → Economics  | 
| BPQL | Business Process Query Language | In English | → Programming languages → Economics  | 
| BPS | Basic Programming Support | In English | |
| BSA | Business Software Alliance | In English | → Organizations and associations | 
| BSD | Berkeley System Distribution | In English | → Operating systems | 
| BSD | Berkeley Software Distribution | In English | → Operating systems | 
| BSD | Berkeley Standard Distribution | In English | → Operating systems | 
| BSF | Bean Scripting Framework | In English | → Programming languages | 
| BSS | Begusch Software Systeme | In German | |
| BSW | BFS Software | In English | |
| BTSS | Basic Time Sharing System | In English | → Operating systems | 
| BVD | Biometric Virus Detection | In English | → Computer infections | 
| BXML | Backbase eXtensible Markup Language | In English | → Programming languages | 
| CA | Computer Associates | In English | |
| CAA | Component Application Architecture | In English | |
| CAAML | Canadian Avalanche Association Markup Language | In English | → Earth sciences → Canada  | 
| CACCIA | Contrôle des ACCès à l'Infrastructure Applicative | In French | |
| CAMP | Computer-Aided Message Processing | In English | |
| CAMS | Cast Application Mining Suite | In English | |
| CANCER | Computer Analysis of Nonlinear Circuits, Excluding Radiation | In English | → Computer programs → Computer simulation → Electronics  | 
| CAP | Computer Application Program | In English | |
| CAPI | Common Application Programing Interface | In English | |
| CARO | Computer Antivirus Research Organization | In English | → Organizations and associations → Computer infections  | 
| CAS | Computer Aided Selling | In English | → Trade | 
| CASE | Computer-Automated Software Engineering | In English | |
| CASE | Computer Aided Software Engineering | In English | |
| CATER | Contextualized Access of Tourism-Related Electronic Resources | In English | → Tourism | 
| CBL | Composite Blocking List | In English | → Networks, communication | 
| CCAL | Cahier des Clauses d'Acceptation Logiciel | In French | → Contract law | 
| CCD | Checkout Command Decoder | In English | |
| CCL | Core Component Library | In English | |
| CCL | Concise Command Language | In English | |
| CDC | Connected Device Configuration | In English | → Computer hardware | 
| CDDIS | Crustal Dynamics Data Information System (http://https://cddis.nasa.gov/) | In English | → Data → Astronautics → Geodesy, cartography  | 
| CDE | Collaborative Development Environment | In English | |
| CDLC | Connected Limited Device Configuration | In English | |
| CDO | Collaboration Data Objects | In English | |
| CDOEX | Collaboration Data Objects for EXchange | In English | |
| CDONTS | Collaboration Data Objects for Windows NT Server | In English | |
| CDOSYS | Collaboration Data Objects for Windows 2000 | In English |