| Abbreviation | Definition |
|---|---|
| AAWA | Advocates for Awareness of Watchtower Abuses |
| AAWC | Asian American Women's Coalition |
| AAWO | Albanian American Women Organization |
| AAWS | Alcoholics Anonymous World Service |
| AAWS | Alliance to Abolish Workplace Surveillance |
| AAWS | Association of African Women Scholars |
| AAWV | American Association for Wartime Veterans |
| AAWV | Association Of Afghanistan War Veterans |
| AAWW | Alpaca Association Of Western Washington |
| AAYA | Asian American Youth Alliance |
| AAYA | Azerbaijan American Youth Association |
| ABA | American Bass Association |
| ABA | American Birding Association |
| ABA | American Burn Association |
| ABAI | American Board of Allergy and Immunology |
| ABAN | A Ban Against Neglect |
| ABBA | Aid Babies Battling AIDS |
| ABC | American Bird Conservancy |
| ABC | Association for Business Communication |
| ABCG | Adult Blood Cancer Group |