| Abbreviation | Definition |
|---|---|
| ATTO | Association of Thai Tour Operators |
| ATV | Akademiet for de Tekniske Videnskaber |
| AUA | American Urological Association |
| AURA | Association of Underwater Rebreather Apparatuses |
| AusAID | Australian Agency for International Development |
| AUSIT | AUStralian Institute of Interpreters and Translators |
| AUTM | Association Of University Technology Managers |
| AVA | American Veal Association |
| AVBC | Association of Veterinary Biologics Companies |
| AVD | Association of Video Dealers |
| AVDA | American Veterinary Distributors Association |
| AVECCT | Academy of Veterinary Emergency and Critical Care Technicians |
| AVGP | Asociación Valenciana de Gestión Pública (Valencian Association of Public Management) |
| AVMA | American Veterinary Medical Association |
| AVMA | Autonomous Vehicle Manufacturers Association |
| AVPMA | Australian Veterinary Practice Managers Association |
| AVSTS | Association For Veterinary Soft Tissue Surgery |
| AWA | American Waterworks Association |
| AWA | American Whaling Association |
| AWA | American Womens Association |