| nvr | NeverForget Reminder Data |
| nvram | VMware Virtual Machine NVRAM Data |
| nvsg | NVIDIA SceniX Data |
| nvt | NeuraLynx Video Tracker 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 |
| nwb | Nikon Capture White Balance Data |
| nwbak | NeatWorks Database Backup |
| nwc | NavisWorks Cache File |
| nwc | NetSim Multiple Device Configuration Data |
| nwcab | Neat Cabinet |
| nwdb | Neat Database |
| nwelicense | Nisus Writer Pro License Data |
| nwf | FTS Comm Control Data |
| nwg | NetEase Game Replay |
| nwid | NeoEngine Data |
| nwk | Nano Wiki Engine Data |
| nwm | Nisus Writer Pro Macro Data |
| nwm | Sony NWM Display Screen |
| nwo | NWChem Output File |
| nwp | NavisWorks Presenter Material Palette |
| nwp | NEC-Win Plus Proprietary Format Data |
| nwp | Now Contact WP Data |
| nwpd | VivaNWP Designer Template |
