| Abbreviation | Definition |
|---|---|
| NMM | New Media Manitoba |
| NMM | new media medicine |
| NMO | Nuns, Mothers, and Others |
| NMR | Nielsen Media Research |
| NMRC | Native Media Resource Center |
| NMRC | New Media Resource Center |
| NMRI | New Media Research Institute |
| NMS | The National Midnight Star |
| NMSR | New Media Service Ranking |
| NMusicR | New Music Review (publication) |
| NMW | New Media West |
| NMW | New Media Works |
| NN | Netscreen News |
| NN | Nevada News |
| NNA | Nationalist News Agency |
| NNA | News Network Anthroposophy |
| NNADR | New Nonprofit Almanac and Desk Reference |
| NNB | Noon News Bulletin |
| NNI | News Network International |
| NNN | Neighborhood Network News |