| Abbreviation | Definition |
|---|---|
| NFS | Network File System |
| NFS | Nozzle Flow Sensor |
| NFSP | Nonflight Switch Panel |
| NFSP | Non-Flight Switch Panel |
| NFW | Nonfuel Wasting |
| NFW | Non-Fuel Wasting |
| NG | Narrow Gage |
| NG | Nitrogen Gage |
| NG | Nose Gear |
| NGM | Nitrogen Generation Module |
| NH | Nominal Height adjustment maneuver |
| NH | Northern Hemisphere |
| NH3 | Ammonia |
| NH4 | Hydrazine |
| NHA | Next Higher Assembly |
| NHB | NASA HandBook |
| Ni | Nickel |
| NIA | NOVA Interface Adapter |
| NIAC | NASA Innovative Advance Concepts |
| NIAC | NASA Innovative Advanced Concepts |