| nopt | Navicat for Oracle Data Transfer Profile Data |
| not | Adobe InCopy User Dictionary |
| MakeMusic Finale Note File |
| Zemax Element Drawing Note |
| note | Corel WordPerfect for Mac Help Data |
| Notability Note Data |
| notx | E-Sword v9 Study Note |
| notz | FiiNote Exported Note |
| nou | Numerical Electromagnetics Code Output |
| nov | Native Instruments Battery Data |
| novafold | NovaFold Format Data |
| novs | Novell NetWare Control Center Data |
| nox | Wave IRIS NOx Data |
| noy | NOY Backup Data |
| nozskin | WinDS PRO NOZSkin Data |
| nozzlelibrary | Corel Painter Nozzle Library |
| np | Nokia Planner Project Schedule Data |
| np2 | Nikon Picture Control v2 Data |
| np3 | NP3 Compressed Nucleotide Database |
| npa | ReliaSoft Weibull++ NPA Data |
| npbk | NoxPlayer Backup Data |
| npc | Intuit QuickBooks Online Banking Data |
| Nikon Picture Control Data |
| npd | Ultra Network Sniffer Captured Data |
| npdm | Nintendo Switch ExeFS Data |
| npdoc | Newspilot Document |
| npext | Newspilot External Document |
| npf | Nick-O-Matic Design Factory NPF Data |
| npg | Magentic Data |
| nph | Xilinx ISE Physical Resources Data |
| npi | Nick-O-Matic Design Factory Data |
| Nikon Capture Filter Data |
| npimg | Newspilot Image Data |
| npjob | Newspilot Job Description |
| npk | MikroTik Router OS Upgrade Package |
| npl | Allplan Engineering Plot Layout Data |
| Cubase Library Data |
| Dart Pro 98 Noiseprint Info |
| Xilinx ISE Project |
| npm | CorelDRAW 10 Draw Media Lines Data |
| npn | ACDSee Canvas Neon Pen Data |
| npo | Nonpareil Redundancy Summary Output |
| nppe | Navicat for PostgreSQL Exported Table |
| nppj | Navicat for PostgreSQL Batch Job |
| npr | Lotus Notes Reporter Data |
| nps | Lotus Agenda NPS Data |
| Natron Node Presets Data |
| NeroMIX Data |
| NTI Backup Now Partition Set |
| npsf | eXtendable Wad Editor NPSF Data |
| npt | Dart Pro 98 Noiseprint Archive Import |
| NetPoint Schedule Data |
| npw | nPassword Database File |
| npy | NumPy Data File |
| npz | GameGuard Update Data |
| NumPy Zipped Data |
| nqa | NQuery Advisor Data |
| nqf | Eset NOD32 Quarantine Data |
| nqi | ESET Smart Security Quarantined File Information |
| nqr | Niviqure ECG Data |
| nqst | SoundEdit Data |
| nr | Ninja Ripper Data |
| nr-vmp | BrainVoyager QX Native Resolution Volume Map |
| nrbak | NeatReceipts Backup Data |
| nrc | AQUA NOE Distance Restraints Counts Data |
| nrd | NeuraLynx RAW Data |
| nrf | Lotus Notes Redirect File |
| Neat Document Folder File |
| nrg | WaterGEMS Energy Calculations Results Data |
| nrkt | NI REAKTOR User Presets Data |
| nrl | iManage Data |
| nrm | Lucene Norms File |
| nrmlib | Neat Cabinet File |
| nrp | ASP.NET Report Maker Report |
| nrrd | Nearly Raw Raster Data |
| nrs | NovaBACKUP Restore Script |
| nrsv | theWord New Revised Standard Version Bible Module |
| nrt | Neat 3 Legacy Contacts Data |
| nrv | AQUA NOE Distance Restraints Violations Data |
| nrx | Neat Receipt Folder File |
