| AAB | Alliance Agricole Belge |
|---|---|
| AAC | Alliance Agricole Belge |
| AACO | Australian Agricultural Company (skr.) |
| AAE | Australian Air Express |
| AAI | Alliance of American Insurers |
| AAP | Australian Associated Press (skr.) |
| AAR | Alliance for Aging Research |
| AAS | Alliance of AIDS Services (skr.) |
| AAS | Australian Academy of Science |
| AAS | Australian Accounting Standard |