| Abbreviation | Definition |
|---|---|
| AASLD | American Association for the Study of Liver Disease |
| AASLH | American Association for State and Local History |
| AASP | American Association for Single People |
| AASP | Asian Association of Social Psychology |
| AATB | American Association of Tissue Banks |
| AAU | Amateur Athletic Union |
| AAU | Amateur Athletic Union of the United States |
| AAUA | All Assam Unemployed Association |
| AAUC | African American Unity Centers |
| AAUC/N | African American Unity Centers/ National |
| AAUWEF | American Association of University Women Education Fund |
| AAUWLAF | American Association of University Women Legal Advocacy Fund |
| AAVA | Australasian Association Of Volunteer Administrators |
| AAVC | Asian American Voters Coalition |
| AAVCB | Australian Association of Veterinary Conservation Biologists |
| AAVI | Artists Against Violence International |
| AAVIM | American Association for Vocational Instruction Materials |
| AAVIM | American Association Of Vocational Instructional Materials |
| AAVS | American Anti Vivisection Society |
| AAW | Animal Action Week |