| Abbreviation | Definition |
|---|---|
| AAPL | Association of Partners for Public Lands |
| AAPP | American Association Of Patients And Providers |
| AAPP | Assistance Association for Political Prisoners (Burma) |
| AAPS | Association of Alternate Postal Systems |
| AAPS | Australasian Association of Paediatric Surgeons |
| AAPSO | Asian African Peoples Solidarity Organization |
| AAPU | American Association of Pediatric Urologists |
| AAQI | Alzheimer's Art Quilt Initiative |
| AAR | Alliance for Aging Research |
| AARC | Alliance of Artists and Recording Companies |
| AARC | Alzheimer's And Aging Research Center |
| AARC | American Association for Respiratory Care |
| AARC | America's Addiction Recovery Centers |
| AARC | Animal Adoption And Rescue Center |
| AARC | Antique Automobile Restorers Club |
| AARC | Assassination Archives and Research Center |
| AARDA | American Autoimmune Related Diseases Association |
| AARDAI | American Autoimmune Related Diseases Association, Inc. |
| AARF | Animal Angel Rescue Foundation |
| AARI | Asthma And Allergy Research Institute |