| njf | Lotus Notes Job Data |
| nji | Nero BackItUp Job Information |
| njob | NDARC Job Data |
| njt | Nero BackItUp Job Template |
| nk2 | Microsoft Outlook 2002 Auto Complete Nick List |
| nk4 | NUMROTO Keyfile |
| nka | NI Abbey Road Drummer Data |
| nkd | Nikon ViewNX Thumbnail Cache |
| nkfn | Kernel for NTFS Data Recovery Snapshot Data |
| nkg | Native Instruments Kontakt Groups |
| nki | Nikon ViewNX Thumbnail Cache |
| nkjv | theWord New King James Version Module |
| nksc | Nikon Capture NX-D Sidecar Data |
| nksf | Native Kontrol Standard Presets Library |
| nksn | Native Instruments Kontakt Settings |
| nksr | NI REAKTOR Rack Data |
| nkt | nKPRO Telemetry Data |
| nktrl2_data | Korg nanoKontrol2 Settings Data |
| nktrl_data | Korg Kontrol Editor Scene Data |
| nkv | PLDA Shared Model |
| nky | NUMROTO Keyfile |
| nl | AMPL NL Problem File |
| nl | Natron Layout Data |
| nl | newlook Screen Data |
| nl | Norton Desktop Icon Library |
| nl | NoteLedge Data |
| nl2 | eSignal Market Depth Data |
| nlang3 | Ashampoo Internet Accelerator Localisation Data |
| nlb | MyDraw Binary Library |
| nlb | Oracle Locale Builder Binary File |
