| 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 |
| 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 |
| nlc | Nero Linux Compilation |
| nld | Norland Image Format File |
| nlf | ClickTracks Normalized Log File |
| nlf | MicroSim PCBoard Netlist |
| nlg | Nestopia Language Data |
| nlk | Microsoft Outlook 2003 E-mail Cookies Data |
| nll | newlook Batch Script |
| nlm | Novell NetWare Loadable Module |
| nlo | Lotus Notes Linked Object |
| nlogo | NetLogo Model |
| nlogo3d | NetLogo 3D Model |
| nlp | NirLauncher Package |
| nlpe | Navicat for SQLite Exported Table |
