| Abbreviation | Definition |
|---|---|
| ADBL | Athletic Development Basketball League |
| ADBL | Athletic Developmental Basketball League |
| AMBL | Aurora Municipal Basketball League |
| ANBL | Australian National Basketball League |
| APG | Assists Per Game |
| ARBL | Auburn Recreational Basketball League |
| ATBB | Andover Traveling Boys Basketball |
| AUBC | Aberdeen University Basketball Club |
| AUBC | Asian University Basketball Championships |
| AUBC | Atlantic University Basketball Conference |
| AUBF | Asian University Basketball Federation |
| AWBC | Austrian Women Basketball Community |
| AYB | Alameda Youth Basketball |
| AYB | Amherst Youth Basketball |
| AYBT | American Youth Basketball Tour |
| BAA | Basketball Association of America |
| BABL | Bordentown Area Basketball League |
| BAL | Basketball Africa League |
| BASKET | Basketball |
| BAW | Basketball Association of Wales |