| File extension Name |
extension description |
| .N | Neko Bytecode (Motion-Twin) |
| .N | Nuke Randomic Life Generator |
| .N | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .N1 | Nuke Randomic Life Generator |
| .N1E | OM2 OMALI NENA Encrypted Document Version 1 |
| .N2E | OM2 OMALI NENA Encrypted Document Version 2 |
| .N2P | Net2Phone File |
| .N3 | Notation 3 Document |
| .N3D2 | The Nebula Device 2 Mesh Resource File in ASCII Format (RadonLabs GmbH) |
| .N3E | OM2 OMALI NENA Encrypted Document Version 3 |
| .N4E | OM2 OMALI NENA Encrypted Document Version 4 |
| .N64 | MiMiX Emulator |
| .N64 | Nintento 64 Emulation ROM Image |
| .NA | NoAdware Data File (NoAdware.net) |
| .NA2 | Netscape Communicator Address Book |
| .NAB | Netscape Communicator Address Book |
| .NAB | Novell Groupwise Address Book (Novell, Inc.) |
| .NACHTMUSIK | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAD | Noder File |
| .NAF | Compressed Archive |
| .NAI | WinINSTALL File |
| .NAIL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAK | Audio |
| .NAL | ArrayScribe (NimbleGen Systems Inc.) |
| .NAL | ZENworks Suite Network Delivered Application Shortcut (Novell, Inc.) |
| .NAL | Systems Management Server (SMS) Network Abstraction Layer (Microsoft Corporation) |
| .NAM | Office Name File |
| .NAME | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAMEONCLIPBOARD | NAMEONCLIPBOARD Powertoy File |
| .NAMES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAN | Nanoscope File |
| .NAP | ePolicy Orchestrator Network Associates Package (Policy File) (Network Associates Technology, Inc.) |
| .NAP | VideoShow/EnerGraphics NAPLPS Vector Image Metafile |
| .NAP | Napster Music Security Definition File |
| .NAP | EnerGraphics VideoShow File |
| .NAP | NAP Metafile Vector Image |
| .NAP | Electrical Network Analysis and Planification |
| .NAPLPS | North American Presentation Layer Protocol Syntax = Vector image |
| .NAR | .NET Archive |
| .NAR | Nikon Capture Advanced RAW File (Nikon Inc.) |
| .NARC | Nintendo ARChive (Nintendo) |
| .NAS | Nasal Script (Andy Ross) |
| .NAS | NASTRAN File |
| .NASB | TheWord & Bible Companion New American Standard Bible |
| .NASL | Nessus Attack Scripting Language Key File (Tenable Network Security) |
| .NAV | Counter-Strike: Source CSBot Navigation Mesh (Valve Corporation) |
| .NAV | Navigator Desktop File (Tecepe) |
| .NAV | MSN Application Extension |
| .NAV | Application Extension (Microsoft Corporation) |
| .NAV | Microsoft Network Component (Microsoft Corporation) |
| .NAVGTR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NAZ | EMC Navisphere Management Suite Performance Log (EMC Corporation) |
| .NB | Mathematica Notebook (Wolfram Research, Inc.) |
| .NB | Nota Bene Document File (Nota Bene Associates, Inc.) |
| .NB | WordPerfect Notebook (Corel Corporation) |
| .NB0 | Microsoft Device Emulator OS image (Microsoft Corporation) |
| .NB7 | NovaBACKUP System Configuration File (NovaStor Corporation) |
| .NBA | Nota Bene Configuration Information File (Nota Bene Associates, Inc.) |
| .NBA | NBA Game Data |
| .NBATTRS | NetBeans Project Attributes File (Collab.Net, Inc.) |
| .NBE | Nessus File |
| .NBF | Backup NOW! Backup Archive (NewTech Infosystems) |
| .NBF | NVIDIA Scene Graphic (NVIDIA Corporation) |
| .NBG | NBG Clean Registry File |
| .NBI | BackItUp (v1.x) Document (Nero AG) |
| .NBK | i-Brarian |
| .NBK | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NBK | NovaBACKUP Script (NovaStor Corporation) |
| .NBM | Guy's Power Albums Archive |
| .NBM | NetBeans Module (Sun) |
| .NBP | Western Digital Backup File (Western Digital Corporation) |
| .NBP | Mathematica Player Notebook File (Wolfram Research, Inc.) |
| .NBP | NeoBook Plug-in (NeoSoft Corp.) |
| .NBP | NetBiter webSCADA Firmware Patch (Intellicom Innovation AB) |
| .NBU | NetBiter webSCADA Firmware Update (Intellicom Innovation AB) |
| .NBU | Nokia PC Suite Content Copier (Backup) File (Nokia) |
| .NC | neatComponents |
| .NC | Geopath Machine Part File (SolutionWare Corporation) |
| .NC | Mastercam NC Programs (CNC Software, Inc.) |
| .NC | Graphics File |
| .NC | NetCDF Network Common Data Form (Unidata) |
| .NC | X-editor Program for CNC Machines (X-net ApS) |
| .NC | Numerical Control Machine Instructions |
| .NC | Preprosessed GOC Source |
| .NC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NCA | NetCam Supervisor Archive |
| .NCA | Nikon Capture Color Adjustment File (Nikon Inc.) |
| .NCB | Nikon Capture Color Booster File (Nikon Inc.) |
| .NCB | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NCB | Developer Studio File (Microsoft Corporation) |
| .NCC | Nikon Capture Camera File (Nikon Inc.) |
| .NCC | NetCam Supervisor Directory |
| .NCC | Nokia PC Suite Content Copier File (Nokia) |
| .NCC | NetControl V1 1999 |
| .NCC | Computer Numeric Control File |
| .NCD | NTI CD-Maker File |
| .NCD | Norton Change Directory |
| .NCD | Xilinx Integrated Software Environment Native Circuit Description (Xilinx, Inc.) |
| .NCD | CoverDesigner CD Cover Picture (Nero) |
| .NCE | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NCF | Systems Management Server (SMS) Network Configuration File (Microsoft Corporation) |
| .NCF | Notes Internal Clipboard (IBM) |
| .NCF | Netware Command File (Novell, Inc.) |
| .NCF | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NCF | Steam Game Configuration File (Valve Corporation) |
| .NCF | GibbsCAM CNC Program Listing (Gibbs and Associates, Inc.) |
| .NCH | Outlook Express Folder File (Microsoft Corporation) |
| .NCH | On Hold Message/Music File |
| .NCI | Mastercam Toolpath File (CNC Software, Inc.) |
| .NCI | NetCam Supervisor Meta Data |
| .NCL | RHS Nibbles Custom Level (Redwood High School) |
| .NCM | Communicator Configuration Message (Nokia) |
| .NCM | NetCam Supervisor Video |
| .NCO | Nero BackItUp Compressed Backup File (Nero AG) |
| .NCP | NHL Ice Hockey 2002 User NHLcards File |
| .NCR | NCR Image |
| .NCS | Star Wars: Knights of the Old Republic (KotOR) Compiled Script (BioWare/Pandemic Studios) |
| .NCS | Netscape Conference Call File |
| .NCSA | NCSA Hierarchical Data File Bitmap |
| .NCT | Nero Cover Designer Template (Nero AG) |
| .NCV | Nikon Capture Curves File (Nikon Inc.) |
| .NCX | SecurDataStor Secure Archive (encryptX Corporation) |
| .NDA | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NDAS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NDB | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDB | NEPLAN Loads (Node Data) and Feeders File (BCP Busarello + Cott + Partner Inc.) |
| .NDB | ProWORX Nxt Short Comment (Schneider Electric) |
| .NDB | NetOp Various Information Files |
| .NDB | ACT! Notes Data File (Best Software CRM Division) |
| .NDB | SeeYou Waypoint (Naviter) |
| .NDB | Intellicom Network Database |
| .NDC | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDCT | DALiM LiTHO Continuous Tone Bitmap (Blanchard Systems Inc.) |
| .NDD | Nikon Capture Digital DEE File (Nikon Inc.) |
| .NDF | NimbleScan NimbleGen Design File (NimbleGen Systems Inc.) |
| .NDF | SQL Server Secondary Data File (Microsoft Corporation) |
| .NDF | ProWORX Nxt Short Comment (Schneider Electric) |
| .NDF | NeoPlanet Browser File |
| .NDF | Channel Data File |
| .NDG | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDK | Notes Database Design Elements (IBM) |
| .NDK | OS/2 Saved Disk Format (IBM) |
| .NDL | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDL | Nodelist File |
| .NDL | Notes Link (IBM) |
| .NDL | Inmos Hardware Network Description File |
| .NDM | Enemy Territory: Quake Wars Demo (Activision, Inc.) |
| .NDO | 3D Low-polygon Modeler |
| .NDP | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDQ | Totem Cash Data File |
| .NDR | RAVE Reports Report File (Nevrona Designs) |
| .NDR | Nikon Capture Image Dust Off File (Nikon Inc.) |
| .NDS | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NDS | Nintendo DS Game ROM Image (Nintendo) |
| .NDS | Indiana Jones and the Infernal Machine Saved Game (Lucasfilm Entertainment Company Ltd.) |
| .NDT | NEPLAN External Program Import/Export File (BCP Busarello + Cott + Partner Inc.) |
| .NDW | Allplan Drawing File (Nemetschek A.G.) |
| .NDX | Index |
| .NDX | Rational XDE (IBM) |
| .NDX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NDX | WINDEV Index (PC SOFT) |
| .NDX | ArcView Fonts Index File (ESRI) |
| .NE1 | OM2 OMALI NENA Document Version 1 |
| .NE2 | OM2 OMALI NENA Document Version 2 |
| .NE3 | OM2 OMALI NENA Document Version 3 |
| .NE4 | OM2 OMALI NENA Document Version 4 |
| .NEB | Nortec H.E.L.P. |
| .NEBULA | Homeworld Nebula Data (Sierra Entertainment, Inc.) |
| .NEBULOS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEC | PIMS Notes for Windows CE Audio Record File (Nacetech Co., Ltd.) |
| .NEC | NEC JIS Encoded File |
| .NED | MSN Application Extension |
| .NEEDS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEF | Nikon Digital SLR Camera Raw Image File (Nikon Inc.) |
| .NEGPOS | ColorNeg Film Description File (CF Systems) |
| .NEN | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NEO | NeoPhoto NeoPhoto Album (Archive) (DTLink) |
| .NEO | Atari NeoChrome Bitmap Image (Atari) |
| .NEO40SFONT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEPPRJ | NEPLAN Project File (BCP Busarello + Cott + Partner Inc.) |
| .NES | Nessus Attack Scripting Language Key File (Tenable Network Security) |
| .NES | Nintendo Entertainment System ROM Image (Nintendo) |
| .NET | FileMaker Pro Networking Module |
| .NET | netViz Project (netViz Corporation) |
| .NET | Network Configuration |
| .NET | OrCAD Netlist Output File (Cadence Design Systems, Inc.) |
| .NET | SYNETSIM Netlist File |
| .NET | Stuttgart Neural Network Simulator Network Definition |
| .NET | EPANET Data File (United States Environmental Protection Agency) |
| .NETA | Netica Bayes Net File (Norsys Software Corp.) |
| .NETCDF | Scientific data NETwork Common Data Format |
| .NETMODULE | .NET Framework .NET Module (Microsoft Corporation) |
| .NEU | GAMBIT Control Information (ANSYS, Inc.) |
| .NEU | MENSI 3D Laser Scanner File |
| .NEUALL2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEUCHEAT1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEW | New Information |
| .NEW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWFONT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWORDER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWPLR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWS | News Bitmap Image |
| .NEWS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWSLETTER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEWTECH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEX | Nexcon System File |
| .NEX | Neurological Data for Statistical Analysis |
| .NEXTURN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NEZ | Nintento NES ROM Image |
| .NF | CVIP NF_help File |
| .NF2 | NeverForget Reminder File (National Creative Registry, Inc.) |
| .NFB | Nokia PC Suite Content Copier (Backup) File (Nokia) |
| .NFC | Netware Command File (Typo) |
| .NFC | Nokia PC Suite Content Copier File (Nokia) |
| .NFE | Nikon Capture Fisheye Lens Info File (Nikon Inc.) |
| .NFF | Haines Neutral File Format and WorldToolkit minimal 3D scene description language |
| .NFF | WorldToolKit Neutral File Format (Sense8) |
| .NFG | RHS Nibbles Finished Game File (Redwood High School) |
| .NFG | Gambit Normal Form Representation (The Gambit Project) |
| .NFI | DreamBox Image File (Dream Multimedia GmbH) |
| .NFL | Sierra Mastercook Layout File |
| .NFL | AutoCAD Multiline Filter List (Autodesk, Inc.) |
| .NFM | NFM Archival Data Format File (Prevo Technologies, Inc.) |
| .NFO | Folio Infobase (Fast Search & Transfer (FAST)) |
| .NFO | Warez Group Info File |
| .NFO | JCanyon: Grand Canyon for Java DEM Companion File |
| .NFO | System Info File (Microsoft Corporation) |
| .NFO | Text File |
| .NFT | Netobjects Fusion Netobjects System File |
| .NFX | Netobjects Fusion Components BBScomp File |
| .NG | Norton Guide Online Documentation |
| .NGB | Nonogram Puzzle |
| .NGD | Xilinx Integrated Software Environment Native Generic Database (Xilinx, Inc.) |
| .NGD | NimbleScan NimbleGen Gene Description File (NimbleGen Systems Inc.) |
| .NGF | Enterasys Networks NetSight Generated Format File |
| .ngfile | Newsgroup File |
| .NGG | Nokia Phone Group Graphics/Icons (Nokia) |
| .NGL | Stenograph Transcript File (Stenograph, L.L.C.) |
| .NGL | Sheffield Dictionary File |
| .NGO | numberGo Dynamic Report (numberGo, LLC) |
| .NGO | NG Linker Object (NGML) |
| .NGO | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NGP | NeoGeo Pocket ROM Image |
| .NGR | Nokia PC Suite Install Archive (Nokia) |
| .NGR | NEPLAN Graphic (Single Line Diagram) Data File (BCP Busarello + Cott + Partner Inc.) |
| .NGS | NGSSniff File |
| .NGS | NG Compiler Source (NGC) |
| .NH | NetHack Defaults File |
| .NHB | No Hands Backup Backup Description (Anders Petersson's Free Software) |
| .NHF | Nero HFS-CD Compilation (Nero AG) |
| .NHL | NHL Ice Hockey Game 2002 User Teams File |
| .NHM | Systems Management Server (SMS) No History MIF File (Microsoft Corporation) |
| .NHV | Nero HD-BURN-Video Compilation (Nero AG) |
| .NI | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NI | Netobjects Fusion Preview File |
| .NIA | Nikon Capture Image Adjustment File (Nikon Inc.) |
| .NIB | Interface Builder User Interface Resources (Apple Inc.) |
| .NIB | Corel Graphics10 Photopoint File |
| .NIC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NIC | Nici Encrypted Image/Graphic File (The DiScosel Group) |
| .NICHOLS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NICK | Office Data File (Microsoft Corporation) |
| .NICO | Nolan's Icon Maker Icon File (Nolan's Games) |
| .NID | Nikon Capture IPTC Data File (Nikon Inc.) |
| .NIF | Network Initialization File |
| .NIF | GameBryo Format File (Emergent Game Technologies) |
| .NIF | Navy Image File Format |
| .NIF | NetShift Interface File (NetShift Software Ltd.) |
| .NIF | Notation Interchange File Format (NIFF) |
| .NIF | NetImmerse Format File (Numerical Design Limited) |
| .NIFF | Notation Interchange File Format |
| .NIFF | Navy Interchange File Format Bitmap |
| .NIGHT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NIGHTS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NII | NIfTI-1 Data Format (Neuroimaging Informatics Technology Initiative) |
| .NIL | Norton Icon Library File |
| .NIM | Nokia Phone Game File (Nokia) |
| .nindex | Newsgroup Index File |
| .NIP | Network Interface Plug-in |
| .NIRVANA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NIS | Homeworld Non-Interactive Sequence (Sierra Entertainment, Inc.) |
| .NIT | ArcView INFO Table Definitions File (ESRI) |
| .NITF | National Imagery Transmission Format |
| .NIV | TheWord & Bible Companion New International Version Bible |
| .NIX | Rational XDE (IBM) |
| .NJB | Nikon Digital SLR Camera Image Index File (Nikon Inc.) |
| .NJP | njPipes Compiler File |
| .NJX | NJStar Document |
| .NK2 | Outlook AutoComplete File (Microsoft Corporation) |
| .NKC | ECG Viewer (Nihon Kohden Corporation) |
| .NKI | Native Instruments Instruments File (Native Instruments, Inc.) |
| .NKJV | TheWord & Bible Companion New King James Version Bible |
| .NKM | KONTAKT (Native Instruments) |
| .NKS | Native Instruments Library File (Native Instruments, Inc.) |
| .NKY | NUMROTOplus Keyfile (NUM Guettinger) |
| .NL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NL | Norton Desktop Icon Library |
| .NLB | Oracle 7 Data |
| .NLB | Colin Mc Rae Car Race Network Leader Board |
| .NLC | NeroLINUX Compilation (Nero AG) |
| .NLD | ATI Radeon Video Driver |
| .NLD | Windows Media Audio/Video File (Microsoft Corporation) |
| .NLF | ReliaSoft Weibull++ 6 |
| .NLF | MicroSim PCBoard Netlist File for Schematics |
| .NLIST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NLM | Nokia Phones LogoManager Bitmap (Nokia) |
| .NLM | Netware Loadable Module (Novell) |
| .NLO | NetG Skill Builder |
| .NLP | Newsletter Profi 2001 |
| .NLR | NLREG Nonlinear Regression Control File (Phillip H. Sherrod) |
| .NLS | Virus W32/Alman-B and Others |
| .NLS | Code Page National Language Support |
| .NLTRACK | NoLimits Rollercoaster Simulator Track File |
| .NLU | Norton Live Update E-Mail Trigger File |
| .NLU | Practice Platform Shortcut (neuroLanguage Corporation) |
| .NLV | Nikon Capture LCHE Editor File (Nikon Inc.) |
| .NLX | FormWorx Form |
| .NM | RM Number Magic Data File (RM plc) |
| .NM2 | Navitel Navigator Ver 3.1 Map (GPS Moldova) |
| .NMA | Normalised Extinction Corrected Differential Photometry |
| .NMA | GPS Log Data |
| .NMAT | NeoEngine (Reality Rift Studios) |
| .NMD | Nero miniDVD Compilation (Nero AG) |
| .NMD | SwordSearcher File |
| .NMDAR | Connectivity Memory Model Input File When Tau1=0.0 |
| .NMEA | GPS Log Data |
| .NMF | Note-Mate Question Set (StudySoft) |
| .NMF | Lightwave Narmal Map |
| .NMF | Nuzzler Basic Message File (Securepoint Security Solutions) |
| .NMF | Nuzzler Basic Rule Definition File (Securepoint Security Solutions) |
| .NMI | SwordSearcher File |
| .NMK | Oc2.316s Cakit File |
| .NML | .nugthat Compiler Source Code (.nugthat Mark-up Language) (Nuggets Unlimited, Inc.) |
| .NML | NML Language Source File (NevoSoft) |
| .NML | NewsMail 2.0 E-mail Newsletter (ESU-Soft) |
| .NML | NEURO ONE Static Neuron Model (Netral) |
| .NMO | Virtools Behavioral Objects |
| .NMS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NMS | Virtools Graphical Scripts |
| .NMS | Note-Mate Save Position (StudySoft) |
| .NMS | Numega Softice's Loader File |
| .NMV | Nintendulator Movie Capture |
| .NMW | Netmeeting T126 Compatable Whiteboard Document (Microsoft Corporation) |
| .NNB | newnovelist Story Outline |
| .NNB | ANNI (Artificial Neural Network Investing) Batch File (Neural Science) |
| .NNI | ANNI (Artificial Neural Network Investing) Archive of Learned Information (Neural Science) |
| .NNP | ANNI (Artificial Neural Network Investing) Portfolio File (Neural Science) |
| .NNR | Nikon Capture Noise Reduction File (Nikon Inc.) |
| .NNVS | NextNine VNC Player Server to Client Part of VNC Session (NextNine Ltd.) |
| .NOA | Nancy Video CODEC |
| .NOA | Cell Phone Video Clip |
| .NOB | VersaPro Word Exchange File |
| .NOB | Silver Sprites and Data |
| .NOB | Vampire: La Mascarade Archive |
| .NOD | Noder File |
| .NOD | NetObjects Fusion |
| .NOFIN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOI | TGIF-3.0 File |
| .NOKIA | Nokia Ringtone (Nokia) |
| .NOKTXT | Nokia Ringtone (Nokia) |
| .NOL | Nokia Phone Operator (Manager) Logo (Nokia) |
| .NOM | Aonix Nomad |
| .NOMFICHIER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NON | Nonogram Puzzle |
| .NON | Star Wars - Tie Fighter Mouse Options |
| .NOR | Personal Paint Norwegian Language User Interface File (Amiga) |
| .NOR | ATI Radeon Video Driver |
| .NORMAL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NORUN | Unknown |
| .NOT | Broderbund Note Card Type (Riverdeep Interactive Learning Limited) |
| .NOT | Acrobat Spelling File (Adobe Systems Incorporated) |
| .NOT | ActiveNote Post-It-Notes |
| .NOT | Notation or Note |
| .NOT | Note-It Note File (Veign) |
| .NOT | e-Sword Study Note File (Rick Meyers) |
| .NOTE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTE | WordPerfect for Macintosh Help Document (Corel Corporation) |
| .NOTE91 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTEBOOK | SMART Notebook (SMART Technologies ULC) |
| .NOTEPAD | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTESEQ | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTESYN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTESYNTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOTICE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NOW | Text File |
| .NP | Planner Project Schedule (Nokia) |
| .NP | Portfolio NetPublish Web Template (Extensis, Inc.) |
| .NP | Cliq Accessories Notepad Text |
| .NPA | ReliaSoft Weibull++ 6 |
| .NPAC | NeoEngine Resource Package (Reality Rift Studios) |
| .NPC | Jagged Alliance 2 Non-Player Character File (Sir-tech Canada Ltd.) |
| .NPC | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NPD | Ultra Network Sniffer Captured Packet (GJPSoft, Inc.) |
| .NPD | Noder File |
| .NPD | Netrosoft Presentation Document (Netrosoft Corporation) |
| .NPDOC | Newspilot Document (Infomaker Scandinavia AB) |
| .NPEXT | Newspilot External Document (Infomaker Scandinavia AB) |
| .NPF | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NPG | NextPlay Game Data (Covac Software) |
| .NPG | Die Hard - Nakatomi Plaza Saved Game (Sierra Entertainment, Inc.) |
| .NPI | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NPI | dBASE Application Generator Source |
| .NPI | Nikon Capture Filters File (Nikon Inc.) |
| .NPIMG | Newspilot Image Metadata (Infomaker Scandinavia AB) |
| .NPJOB | Newspilot Job Description (Infomaker Scandinavia AB) |
| .NPK | MikroTik RouterOS Upgrade Package (MikroTik) |
| .NPL | Allplan Plot Layout File (Nemetschek A.G.) |
| .NPL | Nokia Audio File (Nokia) |
| .NPL | Xilinx Integrated Software Environment Project File (Xilinx, Inc.) |
| .NPL | Core Media Player Nefertiti Playlist (CoreCodec, Inc.) |
| .NPL | DART Pro 98 Noiseprint Info |
| .NPM | Neopaint Mask |
| .NPM | Corel Graphics Ver 10 Draw Media Lines File (Corel) |
| .NPM | Nokia Phone Picture Message (Nokia) |
| .NPP | Art Explosion Publisher Pro Document (Nova Development Corporation) |
| .NPS | Lotus Agenda File |
| .NPS | NeroMix (Nero AG) |
| .NPSEW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NPT | DART Pro 98 Noiseprint Archive Import |
| .NPT | Portfolio NetPublish Pre-cursor Templates (Extensis, Inc.) |
| .NPV | Pixbend Player Pixbend Media File (Nexilogic) |
| .NPZ | nProtect GameGuard Update File (INCA Internet Co, Ltd.) |
| .NQC | Not Quite C Source Code (Dave Baum) |
| .NQI | NOD32 Quarantined File Information (ESET, LLC and ESET, spol. s.r.o.) |
| .NR3 | Nero MP3 CD-ROM Compilation (Nero AG) |
| .NR4 | Nero AAC CD Compilation (Nero AG) |
| .NRA | Nero Audio-CD Compilation (Nero AG) |
| .NRB | Nero CD-ROM Boot Compilation (Nero AG) |
| .NRC | Nero UDF/ISO CD-ROM Compilation (Nero AG) |
| .NRD | Nero DVD-Video Compilation (Nero AG) |
| .NRE | Nero CD Extra Compilation (Nero AG) |
| .NRF | Neutral Raster File Bitmap |
| .NRF | NEC Scanner File |
| .NRF | Nicolet DataViewer Multi-segment Waveform Data (Nicolet Instrument Technologies, Inc.) |
| .NRG | Nero CD-Image File (Nero AG) |
| .NRG | Norton Registration Entries (Symantec Corporation) |
| .NRH | Nero Hybrid CD-ROM Compilation (Nero AG) |
| .NRI | Trickster Online Image (NTREEV SOFT) |
| .NRI | Nero ISO CD-ROM Compilation (Nero AG) |
| .NRL | iManage File |
| .NRM | Nero Mixed-Mode-CD Compilation (Nero AG) |
| .NRS | Nero CD-ROM (EFI Boot) Compilation (Nero AG) |
| .NRSV | TheWord & Bible Companion New Revised Standard Version Bible |
| .NRT | Nokia Phone Ring Tone (Nokia) |
| .NRU | Nero UDF CD-ROM Compilation (Nero AG) |
| .NRV | Nero Video-CD Compilation (Nero AG) |
| .NRW | Nero WMA CD-ROM Compilation (Nero AG) |
| .NRW | Nikon RAW Image (Nikon Corporation) |
| .NRX | NeatReceipts SCANALIZER Expense Report File (NeatReceipts) |
| .NS1 | NetStumbler NS1 Log |
| .NS2 | Notes Ver 2 Database (Older Form) (IBM) |
| .NS3 | Notes Database (Older Form) (IBM) |
| .NS4 | Notes Database (Older Form) (IBM) |
| .NS5 | Notes/Domino (IBM) |
| .NSB | Novaschem School Schedule |
| .NSC | Noder File |
| .NSC | Windows Media Station File |
| .NSCE | NeoEngine Scene File (Reality Rift Studios) |
| .NSD | Norton System Doctor Sensors Configuration (Symantec Corporation) |
| .NSD | Nero Super Video CD Compilation (Nero AG) |
| .NSD | NRG Site Database |
| .NSDF | NevoSoftDB Standard Format Database File (NevoSoft) |
| .NSF | NES Sound File |
| .NSF | Notes Database (IBM) |
| .NSG | Nessie Saved State |
| .NSG | Notes Database (Older Form) (IBM) |
| .NSH | Nullsoft Scriptable Install System (NSIS) Header/Include File |
| .NSH | Notes Database (Older Form) (IBM) |
| .NSI | Install System Script (Nullsoft) |
| .NSI | Symantec Shared File (Symantec Corporation) |
| .NSI | NewsStand Reader (NewsStand, Inc.) |
| .NSIS | Compressed Archive |
| .NSK | NaShrinK Archive (NashSoft Systems) |
| .NSL | Nokia Phone Startup Logo (Nokia) |
| .NSM | NESticle Movie |
| .NSO | Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) |
| .NSO | NetStudio Easy Web Graphics File |
| .NSOF | NoteStar v1.2a + Options Data (Jayden Carr) |
| .NSP | Multi-Speech Sound File (Kay Elemetrics Corp.) |
| .NSP | Computerized Speech Lab Audio Speech Format (Kay Elemetrics Corp.) |
| .NSR | Nikon Capture Size and Resolution File (Nikon Inc.) |
| .NSR | Nessus Project |
| .NSRD | SH&E NetWorks Report Design (Simat, Helliesen and Eichner, Inc.) |
| .NSS | Bioware Aurora / Obsidian Electron NWN NWScript Source File (BioWare Corp.) |
| .NSS | Norton ScreenSaver Module |
| .NST | Noise Tracker Music Module |
| .NST | Audio |
| .NSV | Nullsoft (Streaming|S as in Soft) Video (Nullsoft, Inc.) |
| .NSV | Winamp3 Video Format File |
| .NSX | Apollo Database Engine Index |
| .NSX | HiPer-Six Index File |
| .NSX | SuccessWare SIX 3.00 Compound Index File |
| .NT | Windows NT Command Script (Microsoft Corporation) |
| .NT0 | Adressmn |
| .NT1 | Adressmn |
| .NT2 | Adressmn |
| .NT3 | Adressmn |
| .NT6 | Orchida Knitting System Universal Flat Knitting Machine Pattern (Orchida Soft) |
| .NT7 | Orchida Knitting System Universal Flat Knitting Machine Pattern (Orchida Soft) |
| .NTC | Nikon Capture Camera Curves Information File (Nikon Inc.) |
| .NTD | Netrosoft Word Processor Text Document (Netrosoft Corporation) |
| .NTE | Holonote Note |
| .NTF | National Transfer Format Map File |
| .NTF | Notes Database Template (IBM) |
| .NTF | National Imagery Transmission Format (NITF) (GlobalSecurity.org) |
| .NTH | Series 60 Theme Studio for Symbian OS Theme File (Nokia) |
| .NTH | ImageMagick Ver. 5.3.2 Visualmagick JBIG File (ImageMagick Studio LLC) |
| .NTM | Navitel Navigator Ver 2.0 Map (GPS Moldova) |
| .NTN | NOTION Performance Score (VirtuosoWorks, Inc.) |
| .NTO | NTOScanner |
| .NTP | Neato CD Labels |
| .NTR | Netrun Executable Text File |
| .NTRK | IL2 Track File (Ubisoft Entertainment) |
| .NTS | Psion Organiser Notepad File (Psion PLC) |
| .NTS | Norton Tutorial |
| .NTS | Netsend Executable Text File |
| .NTS | Norman TurboStore Database Data Storage (Norman ASA) |
| .NTT | CD Label Template |
| .NTT | Neato Label Template (Neato) |
| .NTV | PatternSmith Import File (Autometrix) |
| .NTW | LVNet - Low Voltage Networks Analysis |
| .NTW | Lode Data Network (Lode Data Corporation) |
| .NTW | Noteworthy Composer Song File (NoteWorthy Software, Inc.) |
| .NTX | PIMS Notes for Windows CE Text Note File (Nacetech Co., Ltd.) |
| .NTX | NTX Web Audio File |
| .NTX | Clipper Index |
| .NTX | Network Terminal Accelerator Adapter Card Configuration Information |
| .NTX | yEnc32 yEncoded File |
| .NTX | CARIS Marine Navigation Info |
| .NTZ | InVircible Directory Integrity Information |
| .NU4 | Norton Utilities DLL Root File (Symantec Corporation) |
| .NU6 | Norton Utilities System DLL File |
| .NUF | Procomm Plus New User Message |
| .NUG | .nugthat Player Nugget File (Nuggets Unlimited, Inc.) |
| .NUL | Grand Theft Auto (Playstation 2) Game File (Rockstar Games) |
| .NUL | CCS-lib.2 ACS File |
| .NULL | NULL Image |
| .NUM | Guitar Chords in Nashville Numbering System Format |
| .NUM | DOS 7 File |
| .NUM | Nikon Capture Unsharp Mask File (Nikon Inc.) |
| .NUM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NUMBER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NUMBERS | Numbers Spreadsheet (Apple Inc.) |
| .NUMBERWHEEL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NUMBRWHEEL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NUOVO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NUP | NOD32 Digitally Signed Update File (Eset) |
| .NUT | Star Fox: Assault Texture File (Namco Bandai Holdings, Incorporated) |
| .NUT | NUT Open Container |
| .NUT | .nugthat Player (Nuggets Unlimited, Inc.) |
| .NUV | MythTV NuppelVideo Video File |
| .NUWAGE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NV | Visicontrol MVS-20 Non-Volatile Memory Backup File |
| .NV | Juno Access Number Info File (Juno Online Services, Inc.) |
| .NV | NewViews Accounting Database (Q.W. Page Associates Inc.) |
| .NV! | Net Transport Partial Download (Exciting Software) |
| .NV2 | NewViews Accounting Database (Q.W. Page Associates Inc.) |
| .NV3 | Visicontrol MVS-30/35/40 Flash-Memory Backup File |
| .NVB | NVIDIA Scene (NVIDIA Corporation) |
| .NVC | Nikon Capture Vignette Correction Information File (Nikon Inc.) |
| .NVC | NeroVision Express Project File (Nero AG) |
| .NVD | AOLpress Help |
| .NVD | NetworkView Network Discovery |
| .NVF | Nomad II Voice File (Creative Technology, Ltd.) |
| .NVF | Visicontrol MVS-20 Non-Volatile Memory Backup File |
| .NVL | Netviewer Meet Session Recording (Netviewer AG) |
| .NVM | AOLpress Help |
| .NVP | Nero Effects Filter (Nero AG) |
| .NVR | NeverForget Reminder File (National Creative Registry, Inc.) |
| .NVU | NVIDIA Graphics Card Driver (NVIDIA Corporation) |
| .NVV | NVIDIA Vertex Shader (NVIDIA Corporation) |
| .NVX2 | The Nebula Device 2 Mesh Resource File in Binary Format (RadonLabs GmbH) |
| .NW | Noweb File (Norman Ramsey) |
| .NW | Dispatch Northwest Timetable File (Scott Andrew Borton) |
| .NW | Graal Level (Cyberjoueurs) |
| .NW | NoteWorthy 2 File |
| .NW3 | Netware.3x File |
| .NW4 | Netware.4x File |
| .NW8 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NWB | Nikon Capture White Balance File (Nikon Inc.) |
| .NWC | NavisWorks File |
| .NWC | Noteworthy Composer Song File (NoteWorthy Software, Inc.) |
| .NWD | NavisWorks File |
| .NWF | NavisWorks File |
| .NWID | NeoEngine (Reality Rift Studios) |
| .NWK | Nano Wiki Engine Wiki Data Source (Silvio Torre) |
| .NWN | BioWare Aurora Engine Module (BioWare Corp.) |
| .NWP | NEO Content File |
| .NWS | Newsmaster or Newsmaster II Data File |
| .NWS | Outlook Express News File (Microsoft Corporation) |
| .NWS | Creatacard Newsletter or Photo Album or Presentation or Report Cover or Resume Project (Broderbund) |
| .NWV | Dragon NaturallySpeaking User Profile File (Scansoft, Inc.) |
| .NWX | NWX Editor (TheOutlawDad) |
| .NWX | Outlaws Choreography (LucasArts Entertainment Company LLC) |
| .NW_ | Noteworthy Compressed Audio File |
| .NX1 | NexusDB Database (Nexus Database Systems) |
| .NX2 | NexusDB Database (Nexus Database Systems) |
| .NXD | ndxCards Index Card Project (TruTamil LLC) |
| .NXP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NXP | NEXUS Expansion Pack (reFX Audio Software Inc.) |
| .NXP2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NXS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .NXT | NeXT Sound File |
| .NY | Nyquist Plug-in |
| .NYF | Mybase Database (WJJ Software) |
| .NYM | Sheffield Dictionary File |
| .NYT | Times Reader Article (New York Times) |
| .NZ | Audio Utility Tuningwrench Compressed File |
| .NZB | Newzbin Download Pointer File (Newzbin Ltd) |
| .NZL | Corel Painter Nozzle File |
| .NZN | NoteZilla Sticky Note (Conceptworld Corporation) |