| Abbreviation | Definition |
|---|---|
| ATTC | Addiction Technology Transfer Center |
| AU | Americans United |
| AUI | Anchors Unlimited, Inc. |
| AUL | Americans United for Life |
| AUPHA | Association of University Programs in Healthcare Administration |
| AURI | Applied Urban Research Institute |
| AUS | ARC of the United States |
| AV | American Visions |
| AVA | Alliance of Visual Artists |
| AVAA | Asociacion Venezolano Americana Amistad |
| AVACI | Academy Of Veterinary Allergy Clinical Immunology |
| AVAR | Anti Virus Asia Researchers |
| AVAR | The Association Of Veterinarians For Animal Rights |
| AVBC | Australian Veterinary Boards Conference |
| AVBC | Australian Veterinary Boards Council |
| AVC | Alumni Volunteer Corps |
| AVCA | American Volleyball Coaches Association |
| AVCC | Arkansas Valley Community Center |
| AVER | American Veterans for Equal Rights |
| AVI | AIDS Vancouver Island |