| AAE | American Association of Engineers (skr.) |
|---|---|
| AAI | American Alpine Institute (skr.) |
| AAI | American Alpine Institution |
| AAN | american Alpine News (skr.) |
| ABA | Accredited Business Accountant |
| ABAGNALE | americký zločinec - falšovateľ (Frank, *1948) |
| ABAU | sídlo v Papui-Novej Guinei |
| ABE | Assistant Brigade Engineer |
| ABENAB | namíbijská mineralogická lokalita |
| ABR | Australian Business Register |