| n4d | Plancal Nova Data |
| n52 | Nostromo n52 Gamepad Configuration Data |
| n64 | N64 ROM Image |
| n80 | PC8001 Rom Image |
| n88 | Apple iOS Kernel Cache |
| n90 | Apple iOS Kernel Cache |
| na2 | Netscape Communicator Address Book |
| na2 | SeaMonkey Address Book Data |
| naa | MSNBC News Alert Advertising Data |
| nab | Novell Addressbook |
| nac | 3COM Router Firmware |
| nad | Neighbourhood Algorithm Direct Access File |
| naf | NI Traktor Service Activation Return Data |
| nal | NimbleGen Array Layout Data |
| nal | ZENworks Network Delivered Application Shortcut |
| nam | DMAP Names Dictionary Data |
| nam | MODFLOW Name Dataset |
| nan | NanoScope Software Data |
| nanr | Nitro Animation Resource |
| nap | NAPLPS Metafile |
| napj | Navicat Premium Batch Job Data |
| nar | EMC NaviSphere Analyzer Archive |
| nas | Nastran Input File |
| natvis | Visual Studio Natvis Framework Data |
| nav | CART Grove Data |
| nav | CART Navigator Data |
| nav2 | WinAVI DVD Copy Temporary Data |
| navrep | Catia NavRep Data |
| nax | Moxy Portfolio Information Data |
| nb3 | Navicat for MySQL Backup Data |
