| Abbreviation | Definition |
|---|---|
| NLS | National Literacy Strategy |
| NLS | National Locator Service |
| NLS | Nuclear Localization Signal |
| NM | No Management |
| NMAS | National Map Accuracy Standards |
| NMB | National Mediation Board |
| NMD | No More Dollars |
| NMF | Nuclear Materials Focus |
| NMFA | Nuclear Materials Focus Area |
| NMFS | National Mortality Followback Survey |
| NMI | No Middle Initial |
| NMI | NSF Middleware Initiative |
| NMLCP | National Mobile Land Command Post |
| NMLS | Nationwide Multi-State Licensing System |
| NMNH | National Museum of Natural History |
| NMUD | National Medicare Utilization Database |
| NNDL | NNDL National Notifiable Disease List (infectious diseases reportable to CDC) |
| NNDSS | National Notifiable Diseases Surveillance System |
| NNI | Net New Issuances |
| NNID | Nationally Notifiable Infectious Diseases |