| net | SNNS Network Definition Data |
| neta | Netica Binary Data |
| netspm | NetSpot Map |
| neu | Altair FEKO Femap Geometrical Data |
| nev | NeuraLynx Event Information Data |
| newsloc | Mac OS X Finder News Location Data |
| nex | NeuroExplorer Data |
| nex | NEXUS Data File |
| nf | The Bro NetFlow Data |
| nf2 | NeverForget v2 Data |
| nfa | Netflix for Android Data |
| nfb | Nokia Phone Backup |
| nfc | Nokia Phone Backup |
| nfc | Nokia Phone Backup Copy |
| nfd | Altair FEKO Near Field Data Input |
| nfd_data | Nero Multimedia Suite Data |
| nfe | Nikon Capture Fisheye Lens Data |
| nfg | Gambit Strategic Game Format File |
| nfi | Netflix Downloaded Information |
| nfl | Autodesk AutoCAD Multiline Filter Data |
| nfl | MasterCook Layout Data |
| nfn | NoteFly Note Data |
| nfr | CONTAM Node Flow Results Data |
| nfslicense | netfabb Basic License Key |
| nfy | IBM DB2 Administration Notification Log |
| nfz | JB BAHN Vehicle Data |
| nga | ngPlant Model Archive |
| ngc | NeoGeo Pocket Color ROM Image |
| ngc | Xilinx Platform Studio Generated Netlist |
| ngd | NimbleGen Gene Description Data |
