| nhr | BLAST Header Data |
| nhx | New Hampshire eXtended Format Data |
| nia | Nikon Capture Image Adjustment Data |
| nib | Adobe AIR NIB Data |
| nick | Microsoft Outlook 2000 Auto Complete Nick List |
| nicrash | NI Traktor Crash Data |
| nid | Nikon Capture IPTC Data |
| nif | Gamebryo Model Data |
| nif | NetShift Interface Format Data |
| nifcache | Gamebryo NIF Cache |
| nii | NIfTI-1 Data Format File |
| nil | Norton Icon Library File |
| nil | QIP NIL Data |
| nin | BLAST Nucleotide Database |
| nir | FOSS NIR Spectrophotometers Data |
| niv | theWord New International Version Module |
| nix | IBM Rational XDE Node Instance File |
| nj | MOLPHY Neighbor Joining Phylogeny Data |
| nja | Seifert XRD ASCII Pole Figures Data |
| njb | Nikon Photo Index |
| njc | Seifert XRD Pole Figures Data |
| 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 |
| 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 |
