| Abbreviation | Definition |
|---|---|
| NERVA | Nuclear Engine for Rocket Vehicle Application |
| NESC | NASA Engineering and Safety Center |
| NESC | National Electrical Safety Code |
| NESR | Natural Environment Support Room |
| NET | NASA Employee Team |
| NET | NETwork |
| NET | Network (N/W preferred) |
| NET | No Earlier Than |
| NETCOM | Network Communications |
| NEW | Nasa Educational Workshops |
| NEWMAST | National Education Workshop for Math and Science Teachers |
| NEXT | NASA Evolutionary Xenon Thruster |
| NEXT | NASA Exploration Team |
| NEXUS | NASA Engineering eXtendible United Software |
| NEXUS | NASA Engineering Extendible United Software System |
| NF | Natural Flood |
| NF | Noise Figure |
| NFCS | Nuclear Forces Communications Satellite |
| NFLR | NASA Federal Laboratory Review |
| NFS | NASA FAR (Federal Acquisition Regulations) Supplement |