| .DBA | PDC (Prolog Development Center) | Sikkerhedskopifiler | Turbo Prolog Database | Visual Prolog | PDC (Prolog Development Center) |
| .DBE | Microsoft Corporation | Sikkerhedskopifiler | ActiveSync Backup File Format | Microsoft ActiveSync | Microsoft Corporation |
| .DBK | Sony | Sikkerhedskopifiler | Sony Ericsson Mobile Phone Backup File | WinRAR | Eugene Roshal |
| .DBQ | Corel | Sikkerhedskopifiler | Corel Paradox Memo Data | Corel Paradox | Corel |
| .DIM | Active@ Data Recovery Software | Sikkerhedskopifiler | Active@ Raw Disk Image Backup File | Active@ Disk Image | LSoft Technologies Inc. |
| .DIY | Huntersoft | Sikkerhedskopifiler | My Drivers Backup Setup File | My Drivers | Huntersoft |
| .DMD | Oracle Corporation | Sikkerhedskopifiler | SQL Developer Data Modeler File | SQL Developer Data Model | Oracle Corporation |
| .DNA | GSL Biotech LLC | Sikkerhedskopifiler | SnapGene DNA File | SnapGene | GSL Biotech LLC |
| .DPB | Susteen, Inc. | Sikkerhedskopifiler | DataPilot Backup File | DataPilot | Susteen, Inc. |
| .DSB | Dell Technologies | Sikkerhedskopifiler | Dell DataSafe Backup File | DataSafe Local Backup | Dell Technologies |
| .DSS | The International Voice Association (IVA) | Sikkerhedskopifiler | Digital Speech Standard File | DSS Player Lite | Olympus Corporation |
| .EBF | Microsoft Corporation | Sikkerhedskopifiler | Pocket PC WindowsCE Form | Microsoft Windows CE Embedded | Microsoft Corporation |
| .EBK | Internet Marketing Center | Sikkerhedskopifiler | Ebook Pro Ebook File | The Internet Marketing Center eBook Pro | Internet Marketing Center |
| .ECBK | LG Electronics | Sikkerhedskopifiler | LG PC Suite Calendar Backup | LG PC Suite | LG Electronics |
| .ECS | Sony | Sikkerhedskopifiler | Sony Ericsson Mobile Phone Backup File | WinRAR | Eugene Roshal |
| .EG | Wasay | Sikkerhedskopifiler | Image It Backup Disk Image | Image It | Wasay |
| .EMK | Elex Media | Sikkerhedskopifiler | EMK Compress Archive | Unknown Software | Unknown Developer |
| .ENZ | Thomson Reuters Corporation | Sikkerhedskopifiler | EndNote Connection File | Thomson Reuters EndNote | Clarivate Analytics |
| .ETC | DeskSoft | Sikkerhedskopifiler | EarthTime | EarthTime | The Community Robotics, Education and Technology Empowerment Lab (CREATE Lab) |
| .FB | Serge Voskoboynikov | Sikkerhedskopifiler | Slim! Compressed Archive | Slim! | Serge Voskoboynikov |
| .FBC | Ancestry.com Inc. | Sikkerhedskopifiler | Family Tree Maker For DOS Backup File | Software MacKiev Family Tree Maker | Ancestry.com Inc. |
| .FBK | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Dynamics NAV Backup File | Microsoft Dynamics NAV (Navision) | Microsoft Corporation |
| .FBU | Chuck Baker | Sikkerhedskopifiler | FEBE Firefox Backup File | Mozilla Firefox | Mozilla |
| .FBW | Hewlett-Packard | Sikkerhedskopifiler | HP Recovery Manager Backup File | HP Recovery Manager | Hewlett-Packard |
| .FEZ | FUND E-Z Development Corporation | Sikkerhedskopifiler | FUND E-Z Backup Archive | Fund E-Z | FUND E-Z Development Corporation |
| .FFB | Moneyspire | Sikkerhedskopifiler | Fortora Fresh Finance Backup File | Moneyspire | Moneyspire |
| .FH | Adobe Systems Incorporated | Sikkerhedskopifiler | Adobe FreeHand Image | Adobe FreeHand | Adobe Systems Incorporated |
| .FHF | Cleanersoft Software | Sikkerhedskopifiler | Free Hide Folder Backup File | Cleanersoft Free Hide Folder | Cleanersoft Software |
| .FKC | Softland | Sikkerhedskopifiler | FBackup Catalog | FBackup | Softland |
| .FPT | Sage | Sikkerhedskopifiler | ACT! Data File | Act! | Swiftpage, Inc. |
| .FTMB | Ancestry.com Inc. | Sikkerhedskopifiler | Family Tree Maker Backup File | Software MacKiev Family Tree Maker | Ancestry.com Inc. |
| .FUL | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Backup File List | MsBackup | Microsoft Corporation |
| .FWB | CursorArts Company | Sikkerhedskopifiler | FileWrangler Backup File | FileWrangler | CursorArts Company |
| .FZB | Casio Computer Co., Ltd. | Sikkerhedskopifiler | Casio FZ-1 Bank Dump | Awave Studio | FMJ-Software |
| .GB1 | YoYo Games | Sikkerhedskopifiler | Game Maker Backup File | GameMaker Studio | YoYo Games |
| .GBP | Genie | Sikkerhedskopifiler | Genie Timeline Backup Index File | Genie Timeline | Genie |
| .GCB | Parhelia Tools | Sikkerhedskopifiler | Google Chrome Backup Backup Data File | Google Chrome Backup | Parhelia Tools |
| .GHO | Symantec Corporation | Sikkerhedskopifiler | Norton Ghost Backup File | Symantec Ghost Solution Suite | Symantec Corporation |
| .GHS | Symantec Corporation | Sikkerhedskopifiler | Norton Ghost Image Segment Backup File | Symantec Ghost Solution Suite | Symantec Corporation |
| .GRB | Microsoft Corporation | Sikkerhedskopifiler | MS-DOS Shell Monitor Data | MS-DOS | Microsoft Corporation |
| .HBI | Novosoft | Sikkerhedskopifiler | Handy Backup Backup File | Handy Backup | Novosoft |
| .HDB | HansaWorld | Sikkerhedskopifiler | HansaWorld Database File | HansaWorld Enterprise | HansaWorld |
| .HIF | Quicken | Sikkerhedskopifiler | Quicken Online File | Intuit Quicken | Quicken |
| .HM4 | Lorex Technology | Sikkerhedskopifiler | Lorex Backup File | Unknown Software | Unknown Developer |
| .H_ | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Windows WinHelp Compressed Data | Microsoft Windows | Microsoft Corporation |
| .IBK | Perion Network Ltd | Sikkerhedskopifiler | IncrediMail Account Backup File | IncrediBackup | Perion Network Ltd |
| .ICF | Zoom Telephonics | Sikkerhedskopifiler | Zoom Router Configuration File | LibreOffice | The Document Foundation |
| .IPD | BlackBerry | Sikkerhedskopifiler | BlackBerry Backup File | BlackBerry Desktop Software | BlackBerry |
| .IV21 | Symantec Corporation | Sikkerhedskopifiler | Norton Ghost Incremental Virtual Volume Image | Symantec Ghost Solution Suite | Symantec Corporation |
| .IV2I | Symantec Corporation | Sikkerhedskopifiler | Norton Ghost Incremental Virtual Volume Image | Symantec Ghost Solution Suite | Symantec Corporation |
| .J01 | Open Source | Sikkerhedskopifiler | Akeeba Multi-part Backup Archive | Akeeba eXtract Wizard | Open Source |
| .JBK | Juno | Sikkerhedskopifiler | Juno Backup File | Mozilla Firefox | Mozilla |
| .JPA | Open Source | Sikkerhedskopifiler | Akeeba Backup Archive | Akeeba eXtract Wizard | Open Source |
| .JPS | Open Source | Sikkerhedskopifiler | Akeeba Backup Archive | Akeeba eXtract Wizard | Open Source |
| .JRS | Microsoft Corporation | Sikkerhedskopifiler | Extensible Storage Engine (ESE) Reserve Transaction Log | Microsoft Exchange Server | Microsoft Corporation |
| .JSON | Mozilla | Sikkerhedskopifiler | Mozilla Firefox Bookmarks Backup | Mozilla Firefox | Mozilla |
| .KBB | Jetico, Inc. | Sikkerhedskopifiler | BestCrypt Key Block Backup | BestCrypt | Jetico, Inc. |
| .LBF | LG Electronics | Sikkerhedskopifiler | LG Backup File | LG Mobile Switch | LG Electronics |
| .LBK | General Electric Company | Sikkerhedskopifiler | VersaPro Local Logic Block Backup | VersaPro | General Electric Company |
| .LBXLBK | Libronix Corporation | Sikkerhedskopifiler | Libronix Digital Library System (DLS) License Backup | Digital Library System | Libronix Corporation |
| .LCB | Interscape | Sikkerhedskopifiler | Living Cookbook Backup File | Living Cookbook | Interscape |
| .LDB | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Access Lock File | Microsoft Access | Microsoft Corporation |
| .LLX | National Instruments | Sikkerhedskopifiler | LabVIEW VI Library Backup File | LabVIEW | National Instruments |
| .LMI | 2Wire, Inc. | Sikkerhedskopifiler | HomePortal Firmware Recovery File | HomePortal | 2Wire, Inc. |
| .MACHACHA | Pescados Software | Sikkerhedskopifiler | Split Control File | MacHacha | Pescados Software |
| .MBF | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Money Backup File | Microsoft Money | Microsoft Corporation |
| .MBK | dBase, LLC | Sikkerhedskopifiler | dBASE IV Multiple Index Backup File | dBase | dBase, LLC |
| .MBU | Sony | Sikkerhedskopifiler | Sony CAV-M1000ES Memory Backup File | Sony CAV-M1000ES | Sony |
| .MBW | Firesage Solutions | Sikkerhedskopifiler | MBRWizard Archive | Firesage Solutions MBRWizard | Firesage Solutions |
| .MBZ | Unknown Developer | Sikkerhedskopifiler | Pogoshell NES Emulator Plugin | PogoShell | Unknown Developer |
| .MDBACKUP | Apple | Sikkerhedskopifiler | iPhone Data Backup File | Microsoft Notepad | Microsoft Corporation |
| .MDO | Alcohol Soft | Sikkerhedskopifiler | Alcohol 120% Split Image File | Alcohol 120% | Alcohol Soft |
| .MEM | Microsoft Corporation | Sikkerhedskopifiler | FoxPro Variable File | Microsoft Visual FoxPro | Microsoft Corporation |
| .MIB | Milenix Software Ltd. | Sikkerhedskopifiler | MyInfo Topic Backup | MyInfo | Milenix Software Ltd. |
| .MIG | Microsoft Corporation | Sikkerhedskopifiler | Windows Migration Backup File | Windows Easy Transfer | Microsoft Corporation |
| .MKZ | Interscape | Sikkerhedskopifiler | PokerOffice Database Backup File | PokerOffice | Interscape |
| .MON | Mozilla | Sikkerhedskopifiler | Firefox Monday Bookmark Backup File | Mozilla Firefox | Mozilla |
| .MPB | FJ Soft | Sikkerhedskopifiler | MyPhoneExplorer Backup File | MyPhoneExplorer | FJ Soft |
| .MPR | Open Source | Sikkerhedskopifiler | Bibexcel Data | BibExcel | Open Source |
| .MRBAK | Paramount Software UK Ltd | Sikkerhedskopifiler | Macrium Reflect Backup File | Macrium Reflect | Paramount Software UK Ltd |
| .MS_ | Microsoft Corporation | Sikkerhedskopifiler | Microsoft Windows WinHelp Compressed Data | Microsoft Windows | Microsoft Corporation |
| .MTB | Digistore Solutions | Sikkerhedskopifiler | MediaTracker Database Backup File | MediaTracker | Digistore Solutions |
| .MYC | Joshua Cannon Butcher | Sikkerhedskopifiler | Simply Safe Backup Archive | Simply Safe Backup | Joshua Cannon Butcher |
| .NAB | NetScape | Sikkerhedskopifiler | Netscape Communicator Addressbook | Netscape Navigator | NetScape |
| .NB7 | NovaStor | Sikkerhedskopifiler | NovaBACKUP Output File | NovaBACKUP | NovaStor |
| .NBA | Nero AG | Sikkerhedskopifiler | Nero BackItUp Archive | Nero Backitup | Nero AG |
| .NBF | NTI Corporation | Sikkerhedskopifiler | Backup Now Archive | NTI Backup Now | NTI Corporation |
| .NBK | SMART Technologies | Sikkerhedskopifiler | SMART Notebook File | MimioStudio | Mimio |
| .NBU | Nokia | Sikkerhedskopifiler | Nokia Phone Backup Copy File | Nokia PC Suite | Nokia |
| .NBZ | ArcSoft | Sikkerhedskopifiler | ArcSoft Total Media Backup & Record Backup File | ArcSoft TotalMedia Backup & Record | ArcSoft |
| .NCO | Nero AG | Sikkerhedskopifiler | Nero BackItUp File | Nero Backitup | Nero AG |
| .NDA | Nero AG | Sikkerhedskopifiler | Nero Backup File | Nero Backitup | Nero AG |
| .NFB | Nokia | Sikkerhedskopifiler | Nokia Phone Backup File | Nokia PC Suite | Nokia |
| .NFC | Nokia | Sikkerhedskopifiler | Nokia Phone Backup Copy File | Nokia PC Suite | Nokia |
| .NPF | NTI Corporation | Sikkerhedskopifiler | NTI Partition File | NTI Backup Now | NTI Corporation |
| .NPP | Nova Development | Sikkerhedskopifiler | Art Explosion Publisher Pro Document | Art Explosion | Nova Development |
| .NPS | Open Source | Sikkerhedskopifiler | Natron Node Presets File | Natron | Open Source |
| .NRB | Nero AG | Sikkerhedskopifiler | Nero Burning ROM CD-ROM Boot Compilation | Nero Burning ROM | Nero AG |
| .NRD | Nero AG | Sikkerhedskopifiler | Nero Burning ROM DVD-Video Compilation | Nero 2017 | Nero AG |
| .NRS | Nero AG | Sikkerhedskopifiler | Nero CD-ROM Boot EFI Compilation File | Nero 2017 | Nero AG |
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