| 1 | N | Nicolas Cannasse | Neko Bytecode Format |
| 2 | N2E | N/A | The Incredible Adventures of Van Helsing effect |
| 3 | N2KM | zsword | Headshape Modding 3D Tool For 3D Studio Max Modding |
| 4 | N2PK | N/A | The Incredible Adventures of Van Helsing game data |
| 5 | N3 | N/A | Notation3 document |
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| 6 | N64 | N/A | Nintendo 64 Emulator ROM Format |
| 7 | N81 | Apple, Inc. | Apple IOS Kernel Cache |
| 8 | N88 | Apple, Inc. | Apple IOS Kernel Cache |
| 9 | NA2 | Mozilla | Netscape Address Book Format |
| 10 | NAPJ | N/A | Navicat Premium batch job |
| 11 | NAPT | N/A | Navicat Premium data transfer profile |
| 12 | NB | Wolfram Research | Mathematica Notebook |
| 13 | NB0 | N/A | Google Android Compiled ROM Format |
| 14 | NBH | N/A | ROM Update Utility Image Format |
| 15 | NBKT | N/A | Native Instruments BATTERY kit |
| 16 | NBP | Wolfram Research | Mathematica Player Notebook Format |
| 17 | NBU | Nokia | Nokia Phone Backup Format |
| 18 | NBV | N/A | Generic |
| 19 | NC | CNC Software | Unidata Network Common Data Form Format |
| 20 | NC1 | CNC Software | Xsteel CAD |
| 21 | NCD | Nero | NTI CD-Maker Disk Image |
| 22 | NCGR | Nintendo | Nintendo DS Title Graphics Format |
| 23 | NCH | Microsoft | Outlook Express Folder Format |
| 24 | NCLK | N/A | HTML Formatted Text |
| 25 | NCLR | Nintendo | Nintendo DS Color Palette Format |
| 26 | NCO | Nero | Nero BackItUp Format |
| 27 | NCORX | Adobe Systems | Adobe Encore Project |
| 28 | NCR | N/A | NCR Image |
| 29 | NCS | BioWare | Bioware Aurora / Obsidian Electron Compiled Script |
| 30 | NCT | Nero | Nero CoverDesigner Template |
| 31 | NCW | Nero | Nero CoverDesigner Picture Template Format |
| 32 | ND2 | N/A | Generic |
| 33 | ND5 | N/A | Renamed NDS Format |
| 34 | NDIF | Apple | Apple NDIF Disk Image Format |
| 35 | NDM | Activision | Enemy Territory Quake Wars Demo |
| 36 | NDO | IZware LLC | Nendo |
| 37 | NDPI | Hamamatsu | Hamamatsu TIFF-like Slide Image |
| 38 | NDPR | N/A | Generic |
| 39 | NDS | N/A | Nintendo DS Game ROM |
| 40 | NDX | N/A | DBASE Index Format |
| 41 | NEF | Nikon | Nikon Electronic Format RAW Image |
| 42 | NEO | Atari | NeoChrome Bitmap Image |
| 43 | NES | N/A | Nintendo (NES) ROM Format |
| 44 | NETBOOT | The Open Group | Unix Netboot Script |
| 45 | NETKIT | The GNOME Project | Gnome Desktop |
| 46 | NETWORKCONNECT | Apple | Apple Network Connect Document |
| 47 | NEU | Parametric Technology | Pro/ENGINEER Neutral Format |
| 48 | NEW | Google | Ameco Embroidery Format |
| 49 | NEWSLOC | Apple, Inc. | Apple Mac OS X Finder News Internet Location |
| 50 | NEXE | Google | Chrome Native Client Executable |
| 51 | NEZ | N/A | NES ROM Emulator Image |
| 52 | NFB | Nokia | Nokia Phone Backup Format |
| 53 | NFC | Nokia | Nokia Phone Backup Copy Format |
| 54 | NFF | Autodesk | Neutral Format |
| 55 | NFO | THG | Warez Information Format |
| 56 | NGG | N/A | Nokia Group Graphics Image Format |
| 57 | NGRR | Native Instruments, Inc. | GUITAR RIG Sound |
| 58 | NGW | N/A | NGRAIN 3D format |
| 59 | NHD | Nero AG | Nero AVHCD DVD Compilation |
| 60 | NHF | Nero AG | Nero HFS-CD Compilation |
| 61 | NHN | ijji Games LLC | Ijji REACTOR Html Launch |
| 62 | NHP | N/A | NOAA Hydrophone Data |
| 63 | NHV | Nero AG | Nero HD-BURN-Video Compilation |
| 64 | NIB | Apple | Interface Builder User Interface Format |
| 65 | NICK | Microsoft | Outlook 2000 Nickname Format |
| 66 | NIF | Gamebase | Gamebryo Model Format |
| 67 | NIFF | N/A | NIFF Navy Image Format |
| 68 | NIL | Symantec Corporation | Norton Icon Library |
| 69 | NIP | Microsoft Corporation | Microsoft DRM (Digital Right Management) |
| 70 | NIST | NIST | Audio |
| 71 | NJ | N/A | Nunjucks template |
| 72 | NJK | N/A | Nunjucks template |
| 73 | NK2 | Microsoft | Outlook 2002 Nickname Format |
| 74 | NKB | Native Instruments | Kontakt Audio Bank |
| 75 | NKI | Native Instruments | KONTAKT Instrument Format |
| 76 | NKM | Native Instruments | Kontakt Multi Instrument Format |
| 77 | NKS | Native Instruments | Kontakt Monolith Container |
| 78 | NKX | Native Instruments | Kontakt Monolith Container Format |
| 79 | NLM | Nokia | Nokia Logo Format |
| 80 | NLPB | N/A | Navicat for SQLite backup profile |
| 81 | NLPD | PremiumSoft CyberTech Ltd. | Navicat For SQLite Data Synchronization Profile |
| 82 | NLPE | PremiumSoft CyberTech Ltd. | Navicat For SQLite Exported Table |
| 83 | NLPEQ | PremiumSoft CyberTech Ltd. | Navicat For SQLite Export Query Result Profile |
| 84 | NLPEV | PremiumSoft CyberTech Ltd. | Navicat Export View Result Profile |
| 85 | NLPI | PremiumSoft CyberTech Ltd. | Navicat For SQLite Import Wizard Profile |
| 86 | NLPT | PremiumSoft CyberTech Ltd. | Navicat For SQLite Data Transfer Profile |
| 87 | NLS | Microsoft | Microsoft National Language Support Format |
| 88 | NM2 | Navitel | Navitel Map Format |
| 89 | NM5 | Nova Mind Software Pty Ltd. | NovaMind Mind Map |
| 90 | NMBTEMPLATE | Apple | Numbers Spreadsheet Template |
| 91 | NMD | Nero AG | Nero MiniDVD Compilation |
| 92 | NMEA | National Marine Electronics Association | NMEA Data File |
| 93 | NMPB | N/A | Navicat for MariaDB backup profile |
| 94 | NMPD | N/A | Navicat for MariaDB data synchronization file |
| 95 | NMPE | N/A | Navicat for MariaDB export wizard profile |
| 96 | NMPEQ | N/A | Navicat for MariaDB export query result profile |
| 97 | NMPEV | N/A | Navicat for MariaDB export view result profile |
| 98 | NMPS | N/A | Navicat for MariaDB structure synchronization |
| 99 | NMPT | N/A | Navicat for MariaDB data transfer |
| 100 | NNA | N/A | NeuralWare data |
| 101 | NOB | N/A | Silver Game Data |
| 102 | NOINDEX | Apple, Inc. | Mac OS X Spotlight Index |
| 103 | NOKOGIRI | Nokogiri Team | Nokogiri Source |
| 104 | NOL | Nokia | Nokia Operator Logo Image Format |
| 105 | NOMEDIA | Google | Android No Media Format |
| 106 | NOPB | N/A | Navicat file |
| 107 | NOPE | PremiumSoft CyberTech Ltd. | Navicat For Oracle Exported Table |
| 108 | NOPEM | PremiumSoft CyberTech Ltd. | Navicat For Oracle Export Materialized View Profile |
| 109 | NOPEQ | PremiumSoft CyberTech Ltd. | Navicat For Oracle Export Query Result Profile |
| 110 | NOPEV | PremiumSoft CyberTech Ltd. | Navicat For Oracle Export View Result Profile |
| 111 | NOPI | PremiumSoft CyberTech Ltd. | Navicat For Oracle Import Wizard Profile |
| 112 | NOR | N/A | Norwegian Localization |
| 113 | NOT | Notation Software | Notation Format |
| 114 | NOTX | Rick Meyers | E-Sword Study |
| 115 | NOT_TERMINATED | Apple, Inc. | Mac OS X Audit Log |
| 116 | NOW | N/A | Readme Format |
| 117 | NP2 | N/A | Generic |
| 118 | NPB | PremiumSoft CyberTech Ltd. | Navicat For MySQL Backup Profile |
| 119 | NPD | PremiumSoft CyberTech Ltd. | Navicat For MySQL Data Synchronize Profile |
| 120 | NPDF | N/A | Normal PDF document |
| 121 | NPDT | N/A | Mac Text |
| 122 | NPEQ | PremiumSoft CyberTech Ltd. | Navicat For MySQL Export Query Result Profile |
| 123 | NPEV | PremiumSoft CyberTech Ltd. | Navicat For MySQL Export View Result Profile |
| 124 | NPJ | PremiumSoft CyberTech Ltd. | Navicat For MySQL Batch Job |
| 125 | NPPD | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Data Synchronization Profile |
| 126 | NPPE | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Exported Table |
| 127 | NPPEQ | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Export Query Result Profile |
| 128 | NPPEV | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Export View Result Profile |
| 129 | NPPI | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Import Wizard Profile |
| 130 | NPPT | PremiumSoft CyberTech Ltd. | Navicat For PostgreSQL Data Transfer Profile |
| 131 | NPT | N/A | Navicat For MySQL Data Transfer Profile Format |
| 132 | NR3 | Nero AG | Nero CD-ROM (MP3) Compilation |
| 133 | NR4 | Nero AG | Nero CD-ROM (AAC) Compilation |
| 134 | NRA | Nero | Nero Audio Compilation |
| 135 | NRB | Nero | Nero CD-ROM Boot Compilation |
| 136 | NRBAK | The Neat Company | Neat Backup |
| 137 | NRC | Nero | Nero Disc Compilation Format |
| 138 | NRD | Nero | Nero DVD-Video Compilation Format |
| 139 | NRE | Nero AG | Nero CD EXTRA Compilation |
| 140 | NRG | Nero | Nero CD/DVD Image Format |
| 141 | NRH | Nero AG | Nero Hybrid CD-ROM Compilation |
| 142 | NRI | Nero | Nero ISO CD Compilation Format |
| 143 | NRM | Nero | Nero Mixed Mode CD Compilation |
| 144 | NRMLIB | The Neat Company | Neat Document Library |
| 145 | NRS | Nero AG | Nero CD-ROM Boot EFI Compilation Format |
| 146 | NRU | Nero | Nero UDF CD-ROM Compilation |
| 147 | NSBCA | N/A | Nintendo DS Model Animation Format |
| 148 | NSBMD | N/A | Nintendo DS Model Format |
| 149 | NSBTX | N/A | Nintendo DS Model Texture Format |
| 150 | NSCONFIG | N/A | nsconfig authentication data |
| 151 | NSCR | Nintendo | Nintendo DS Title Screen Format |
| 152 | NSD | Symantec Corporation | Norton System Doctor Sensor Configuration |
| 153 | NSF | IBM | Lotus Notes Database |
| 154 | NSFE | Disch | Nintendo NES Audio Format With Enhanced Tags |
| 155 | NSLA | N/A | Nero Scalable Audio |
| 156 | NSPD | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Data Synchronization Profile |
| 157 | NSPE | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Exported Table |
| 158 | NSPEQ | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Export Query Result Profile |
| 159 | NSPEV | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Export View Result Profile |
| 160 | NSPI | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Import Wizard Profile |
| 161 | NSPT | PremiumSoft CyberTech Ltd. | Navicat For SQL Server Data Transfer Profile |
| 162 | NST | Microsoft | NoiseTracker Module |
| 163 | NSV | Nullsoft | Nullsoft Streaming Video Format |
| 164 | NT | Microsoft | Windows NT Startup Format |
| 165 | NTH | Nokia | Nokia Series 40 Theme Format |
| 166 | NTS | IBM | Lotus Notes Traveler Server Config Format |
| 167 | NUMBERS | Apple | Numbers Spreadsheet Format |
| 168 | NUNJ | N/A | Nunjucks template |
| 169 | NUNJS | N/A | Nunjucks template |
| 170 | NUNJUCKS | N/A | Nunjucks template |
| 171 | NUPKG | NuGet | NuGet Package |
| 172 | NUSPEC | NuGet | NuGet Specification Format |
| 173 | NUV | N/A | NuppelVideo Format |
| 174 | NVAVI | Nero AG | Split AVI Audio Video Interchange Format |
| 175 | NVF | Creative Labs | Creative Labs NVF Audio Format |
| 176 | NVRAM | VMware | VMware NVRAM Format |
| 177 | NWBAK | The Neat Company | Neat Backup |
| 178 | NWC | NoteWorthy | NoteWorthy Composer Format |
| 179 | NWCTXT | NoteWorthy | NoteWorthy Composer Text Format |
| 180 | NWD | Autodesk | Navisworks Document |
| 181 | NWF | Autodesk | Navisworks Format Set |
| 182 | NWP | Noteworthy Software, Inc. | Noteworthy Player Format Type |
| 183 | NWS | Microsoft | Windows Live Mail Newsgroup Format |
