| Abbreviation | Definition |
|---|---|
| NCT | Nero CD Burner Cover Design Template |
| NDB | Network DataBase |
| NDL | Inmos hardware network description file |
| NDL | Lotus Notes Data |
| NDL | Nodelist file |
| NDX | dBASE Index file |
| NEO | Bitmap graphics (Atari NeoChrome image file) |
| NET | Network Configuration/ Information file |
| NETCDF | Scientific data Network Common Data Format |
| NEW | New info |
| NEWS | Bitmap graphics (NeWS image file) |
| NEWS | NeWS image Bitmap graphics file |
| NFF | Haines Neutral File Format |
| NFF | WorldToolKit Neutral File Format |
| NFO | Filioview database |
| NFO | Help format (Netware Folio) |
| NFO | Info file |
| NG | Norton Guide On-line documentation database |
| NGO | NGML NG linker Object file |
| NGS | NG compiler source file (NGC) |