| nec | NEC Antenna Data |
| nef | Nero BackItUp Encryption File |
| nei | LonWorks Neuron EPROM Image File |
| nes | NES ROM Image |
| nessus | Nessus Network Security Scanner |
| net | KiCad Netlist Data |
| neta | Netica Binary Data |
| netspm | NetSpot Map |
| nex | NeuroExplorer Data |
| nex | NEXUS Data File |
| nf2 | NeverForget v2 Data |
| nfa | Netflix for Android Data |
| nfb | Nokia Phone Backup |
| nfc | Nokia Phone Backup |
| nfg | Gambit Strategic Game Format File |
| nfz | JB BAHN Vehicle Data |
| ngc | Xilinx Platform Studio Generated Netlist |
| ngd | Xilinx ISE Native Generic Database |
| nge | neXus Personal Security Client Data |
| ngrr | Guitar Rig User Presets |
| ngs | NGSSniff Data |
| nick | Microsoft Outlook 2000 Auto Complete Nick List |
| nid | Nikon Capture IPTC Data |
| nii | NIfTI-1 Data Format File |
| nil | Norton Icon Library File |
| niv | theWord New International Version Module |
| nix | IBM Rational XDE Node Instance File |
| njb | Nikon Photo Index |
| nji | Nero BackItUp Job Information |
| njt | Nero BackItUp Job Template |
| nk2 | Microsoft Outlook 2002 Auto Complete Nick List |
| nka | NI Abbey Road Drummer Data |
| nkg | Native Instruments Kontakt Groups |
| nksc | Nikon Capture NX-D Sidecar Data |
| nksn | Native Instruments Kontakt Settings |
