| Abbreviation | Definition |
|---|---|
| ALMS | American Le Mans Series |
| ALPS | Always Lead Partners Suit |
| ALRA | Alberta Lacrosse Referees Association |
| ALS | Anti Line Slap |
| ALSC | Athletic Ladies Social Club |
| ALTA | Atlanta Lawn Tennis Association |
| ALWC | American League Wild Card |
| AM | Atletico Madrid |
| AMA | Amateur Martial Arts |
| AMB | Australian Mountain Bike |
| AMC | Academic Mastery Center |
| AMCJ | Association Marocaine des Champions de Judo |
| AME | Adventure Middle Earth |
| AMF | About Motorcycles Forum |
| AMFA | All Manipur Football Association |
| AMIS | Arrest Me I Skate |
| AMIT | Alaskan Malamute Iditarod Team |
| AML | American League |
| AMP | Adventure for Multiple Players |
| AMP | Atlanta Motorsports Park |