| nvj | Net Vampire Job Data |
| nvl | UniChem Results |
| nvm | PCSX2 Dumped BIOS Configuration File |
| nvp | Net Vampire Job |
| nvp | Nvidia Control Panel Profile |
| nvr | NeverForget Reminder Data |
| nvram | VMware Virtual Machine NVRAM Data |
| nvsg | NVIDIA SceniX Data |
| nvt | Novelty Template |
| nvu | Nvidia Driver Package Data |
| nvx2 | Nebula v2 Mesh Resource Data |
| nw | NWChem Input File |
| nw3 | Novell NetWare 3 Data |
| nw4 | Novell NetWare 4 Data |
| nwa | WindowBlinds Natural Windows Animation |
| nwb | Network Workbench Data |
| nwbak | NeatWorks Database Backup |
| nwc | NavisWorks Cache File |
| nwcab | Neat Cabinet |
| nwdb | Neat Database |
| nwelicense | Nisus Writer Pro License Data |
| nwf | FTS Comm Control Data |
| nwg | NetEase Game Replay |
| nwk | Nano Wiki Engine Data |
| nwm | Sony NWM Display Screen |
| nwo | NWChem Output File |
| nwp | NavisWorks Presenter Material Palette |
| nwt | MODFLOW Newton Solver Data |
| nwv | Dragon NaturallySpeaking User Archive |
| nx1 | NexusDB Database |
