| Abbreviation | Definition |
|---|---|
| AARM | Association for the Advancement of Restorative Medicine |
| AARP | American Association of Retired Persons |
| AARS | All America Rose Selection |
| AAS | American Academy of Sciences |
| AAS | American Archaeological Society |
| AAS | American Association of Suicidology |
| AAS | Arnold Air Society |
| AASD | Actors Alliance Of San Diego |
| AASF | African American Success Foundation |
| AASF | Asian American Scholarship Foundation |
| AASF | Aviation Association of Santa Fe |
| AASG | African American Strategy Group |
| AASG | American Anti Slavery Group |
| AASG | Anti Apartheid Support Group |
| AASG | Arizona Ataxia Support Group |
| AASG | Association of American State Geologists |
| AASHER | Northern California Chapter of the International Public Management Association |
| AASHF | African American Self- Help Foundation |
| AASI | Automotive Association Of Southern India |
| AASL | American Association Of School Librarians |