| AAB | Agence Africaine de Biotechnologie |
|---|---|
| AAE | American Association of Engineers (skr.) |
| AAI | American Alpine Institute (skr.) |
| AAI | American Alpine Institution |
| AAM | Anti Aging Medicine |
| AAN | american Alpine News (skr.) |
| ABA | Accredited Business Accountant |
| ABE | Assistant Brigade Engineer |
| ABM | Automatic Building Machine |
| ABR | Australian Business Register |