NAJ
| Acronym | Definition |
|---|---|
| NAJ | Nurses Association of Jamaica |
| NAJ | National All -Jersey, Inc. (Jersey cow; Reynoldsburg, OH) |
| NAJ | Network Attached Jukebox (system) |
| NAJ | Nepalese Association in Japan (est. 1988) |
| NAJ | Nederland Acid Jazz (band) |
| NAJ | National Association of Jewelers |