| AA | Anti-Aliasing |
|---|---|
| AAB | Antifašistická Akcia Bratislava (skr.) |
| AAB | Associação dos Arquivistas Brasileiros |
| AAB | Australasian Associated Brewers |
| AACO | Asian Americans for Community Outreach |
| AANS | Afroasian News Service (skr.) |
| AAS | Association for Asian Studies |
| ABE | Adult Basic Education |
| ABS | American Bureau of Shipping, spoločnosť klasifikujúca námorné stavby a lode |
| ABSOLUTISTICKÝ | hlásiaci sa k absolutizmu |