| Abbreviation | Definition |
|---|---|
| NLA | Next Lower Assembly |
| NLG | Nose Landing Gear |
| NLT | No Launch unTil .... |
| nM | NanoMeter |
| NM | Nautical Miles |
| NM | Network Manager |
| NM | Non-Metallic |
| NMA | National Management Association |
| NMAB | National Materials Advisory Board |
| NMC | National Meteorological Center |
| NMF | Non Maintenance Free |
| NMI | NASA Management Instruction |
| NMI | Nautical Miles |
| NMO | NASA Management Office |
| NMO | Normal Manual Operation |
| NMOS | Network Mission Operations Support |
| NMP | Non Moving Parts |
| NMT | Not More Than |
| NMT | Notification of Master Tool |
| NMV | Nitrogen Manual Valve |