| nbmap | NintendoWare Bezel Engine Map |
| nbo | nMod n-Body Model |
| nbp | U.S. Military Campgrounds Directory Software Data |
| nbr | NovaBench Report |
| nbs | Nero Burning ROM SecurDisc Compilation |
| nbs | NTI Backup Now Backup Set |
| nbt | Nero BackItUp Template |
| nbu | Nokia Phone Backup Archive |
| nbv | Nero Burning ROM BDMV-Video Compilation |
| nbw | Notesbrowser Data |
| nc | Geopath NC File |
| nc | Mastercam Numerical Control Data |
| nc | RMCProfile List Data |
| nc1 | DSTV-CNC Data File |
| nc1 | Mastercam Numerical Control Data |
| nc1 | NewsLeecher Cache |
| nc2 | NewsLeecher Cache |
| nc2 | NewsLeecher Description Data |
| nc3 | netCDF Data |
| nc4 | netCDF Data |
| ncak1 | NI Audio Kontrol 1 Template |
| ncb | Nikon Capture Color Booster Data |
| ncbr | Nitro Character Tile Data |
| ncc | Nikon Capture Camera Data |
| ncc | Nokia PC Suite Content Copier File |
| ncch | Internet Explorer for Mac Cache Data |
| ncd | PTC Creo CL Syntax Alias Data |
| ncd | Xilinx ISE Native Circuit Description |
| ncdb | NoteCase Pro Database |
| ncde | NoteCase Pro Encrypted Database |
