| AAA | amateur athletic association (skr.) |
|---|---|
| AAM | American Association of Museums |
| AAN | American Academy of Neurology (skr.) |
| AAU | Amateur Athletic Union (skr.) |
| ABB | Amateur Boat Building |
| ABN | Association of British Neurologists |
| AEL | Arab European League (skr.) |
| AEL | Auto Euro Location |
| AEM | Asia Europe Meeting |
| AEN | Asociácia európskych novinárov (skr.) |