| Abbreviation | Definition |
|---|---|
| AAAM | Association for Advancement of Automotive Medicine |
| AAAM | Association of African American Mathematicians |
| AAAP | American Academy of Addiction Psychiatry |
| AAAP | American Association of Avian Pathologists |
| AAAS | American Association for the Advancement of Science |
| AAATP | American Academy of Accounting and Tax Professionals |
| AAAUA | Alamo Area Atari User Association |
| AAB | Academy of Asian Business |
| AAB | Association of Applied Biologists |
| AABA | Asian American Business Association |
| AABA | Association for Accountancy and Business Affairs |
| AABB | American Association of Blood Banks |
| AABH | Association for Ambulatory Behavioral Healthcare |
| AABP | Alliance of Area Business Publications |
| AABP | American Association of Bovine Practitioners |
| AAC | Austrian Association of Cinematographers |
| AACA | American Association of Certified Appraisers |
| AACAP | American Academy of Child and Adolescent Psychiatry |
| AACD | American Academy of Cosmetic Dentistry |
| AACDS | Anne Arundel County Dental Society |