| AAA | amateur athletic association (skr.) |
|---|---|
| AAU | Amateur Athletic Union (skr.) |
| ABB | Amateur Boat Building |
| AC | amateur club (skr.), amatérsky klub (angl.skr.) |
| AES | Amateur Electronic Supply |
| AFA | Amateur Football Association |
| AFC | Amateur Football Club |
| ARC | Amateur Radio Club (skr.) |
| ARES | Amateur Radio Emergency Service |
| ATA | Amateur Trapshooting Association |