| Abbreviation | Definition |
|---|---|
| NMS | Nintendo Magazine Sysem |
| NMU | Non-Maintainer Upload |
| NMU | Non-Maintainer Uploads |
| NMUG | Naples MacFriends User Group |
| NMUG | Naples MUG Discussion Group |
| NMUG | Nashville Mac Users Group |
| NMUG | New Mexico .NET Users Group |
| NN | Not Null |
| NND | No New Data |
| NNJ | Nexus Network Journal |
| NNS | Next Naming System |
| NNTP | Network News Transport Protocol |
| NO | Next Operating |
| NOMAD | Neurally Organized Mobile Adaptive Device |
| NORM | Normalize Once Render Many |
| NOSC | No Operand Set Computer |
| NOV | New Over View |
| NP | Not Paginated |
| NPB | NAS Parallel Benchmark |
| NPC | New Primary Copy |