| Abbreviation | Definition |
|---|---|
| NBA | Nations of Basketball Association |
| NBA | Noon Basketball Association |
| NBAC | Newsmen Basketball Association of Cebu |
| NBAE | National Basketball Association Entertainment |
| NBBA | Newburyport Boys Basketball Association |
| NBC | Basketball Camps |
| NBCA | National Basketball Coaches Association |
| NBDL | National Basketball Development League |
| NBK | no basketball knowledge |
| NBL | National Basketball League |
| NBLC | National Basketball League of Canada |
| NBPA | National Basketball Players Association |
| NBSA | National Basketball Shooters Association |
| NBT | National Basketball Team |
| NBTC | National Basketball Training Center |
| NBV | Niedersächsischer Basketball Verband |
| NBWA | National Basketball Wives Association |
| NCAAB | National Collegiate Athletic Association Basketball |
| NCB | Nandos College Basketball |
| NCBL | Northeastern Conference Senior Basketball League |