| Abbreviation | Definition |
|---|---|
| AAQ | Alliance for American Quilts |
| AARA | Arizona Alliance for Retired Americans |
| AARC | Alliance for Acid Rain Control |
| AARC | Alliance of Artists and Recording Companies |
| AASA | American Agronomic Stewardship Alliance |
| AASC | Alliance of AIDS Services Carolina |
| AASD | Andean Alliance for Sustainable Development |
| AATA | American Automobile Touring Alliance |
| AATWIN | Alliance Against Trafficking of Women in Nepal |
| AAUK | Alliance Automotive UK |
| ABA | Arizona Builders Alliance |
| ABBA | Austin Bridge Builders Alliance |
| ABCD | Alliance for the Betterment of Citizens with Disabilities |
| ABCT | Alliance of Boulder County on Tobacco |
| ABD | Alliance for Board Diversity |
| ABD | Alliance of British Drivers |
| ABIL | Alliance of Business Immigration Lawyers |
| ABMA | All Burma Monks' Alliance |
| ABN | Alliance for Better Nonprofits |
| ABNA | American Bulldog National Alliance |