| AAB | American Association for Bronchology |
|---|---|
| AAB | Arbejdernes Andels Boligforening |
| AABAR | investičný fond v Abú Dhabi |
| AAC | zvukový formát |
| AACO | Asian Americans for Community Outreach |
| AAF | Army Air Forces |
| AAR | Alliance for Aging Research |
| AARNE | fínsky folklorista, fínsky bádateľ v odbore folkloristika (Antti Amatus, 1867-1925) |
| AAS | Association for Academic Surgery |
| AAS | Association for Asian Studies |