| .MFO | Perl Express Group | Pagina-indelingsbestand | Perl ModInfo Descriptor File | Perl | Larry Wall |
| .MFT | Kaspersky Lab | Pagina-indelingsbestand | Kaspersky File Table | Kaspersky Anti-Virus | Kaspersky Lab |
| .MGA | Open Source | Pagina-indelingsbestand | Manga Document | Manga Reader | Open Source |
| .MIF | Adobe Systems Incorporated | Pagina-indelingsbestand | FrameMaker Interchange Format File | Adobe FrameMaker | Adobe Systems Incorporated |
| .MLM | Agile Molecule | Pagina-indelingsbestand | MolMeccano File | Abalone | Agile Molecule |
| .MML | Adobe Systems Incorporated | Pagina-indelingsbestand | FrameMaker Maker Markup Language File | Adobe FrameMaker | Adobe Systems Incorporated |
| .MRG | Interscape | Pagina-indelingsbestand | Now Contact Merge Template | Now Up-to-Date (Now Contact) | Now Software |
| .MTC | Make The Cut, LLC | Pagina-indelingsbestand | Make The Cut! Project | Make the Cut! | Make The Cut, LLC |
| .MVD | Magix Software GmbH | Pagina-indelingsbestand | Movie Edit Pro Movie File | MAGIX Movie Edit Pro | Magix Software GmbH |
| .NPP | Nova Development | Pagina-indelingsbestand | Art Explosion Publisher Pro Document | Art Explosion | Nova Development |
| .NYT | The New York Times Company | Pagina-indelingsbestand | Times Reader Article | Times Reader | The New York Times Company |
| .OMP | MatchWare | Pagina-indelingsbestand | OpenMind Windows Document | MindView for Windows | MatchWare |
| .OPD | Nuance | Pagina-indelingsbestand | OmniPage Document | OmniPage | Nuance |
| .OXPS | Microsoft Corporation | Pagina-indelingsbestand | OpenXPS File | Microsoft XPS Viewer | Microsoft Corporation |
| .P65 | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe PageMaker 6.5 Document | Adobe InDesign | Adobe Systems Incorporated |
| .PA | Nova Development | Pagina-indelingsbestand | Print Artist Project File | Print Artist | Sierra Entertainment |
| .PBX | Sybase, Inc | Pagina-indelingsbestand | PowerBuilder Extension File | PowerBuilder | SAP |
| .PCL | Hewlett-Packard | Pagina-indelingsbestand | Printer Command Language Document | PCLTool | Page Technology Marketing, Inc |
| .PCT | Apple | Pagina-indelingsbestand | Macintosh PICT Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PDF | Adobe Systems Incorporated | Pagina-indelingsbestand | Portable Document Format File | LibreOffice | The Document Foundation |
| .PDG | Broderbund | Pagina-indelingsbestand | Print Shop Deluxe Design File | The Print Shop | Broderbund |
| .PDM | Sybase, Inc | Pagina-indelingsbestand | PowerDesigner Database File | Sybase PowerDesigner | SAP |
| .PDP | Palo Alto Software | Pagina-indelingsbestand | Palo Alto Software Plan Component File | Business Plan Pro | Palo Alto Software |
| .PDR | Microsoft Corporation | Pagina-indelingsbestand | Windows Port Driver | Windows Control Panel | Microsoft Corporation |
| .PDW | AcaClone | Pagina-indelingsbestand | pDRAW32 DNA File | pDRAW32 DNA analysis | AcaClone |
| .PDZ | ProntoForms | Pagina-indelingsbestand | ProntoDoc For Word Structured Text Document Template | Microsoft Word | Microsoft Corporation |
| .PEX | Schlumberger Limited | Pagina-indelingsbestand | Merak Peep Data File | Merak Peep | Schlumberger Limited |
| .PFF | Access | Pagina-indelingsbestand | Formatta Portable Form File | Access Formatta Filler | Access |
| .PFL | PlotSoft | Pagina-indelingsbestand | PDFill Project File | PlotSoft PDFill | PlotSoft |
| .PGS | Grasshopper LLC | Pagina-indelingsbestand | PageStream Document | PageStream | Grasshopper LLC |
| .PICT | Apple | Pagina-indelingsbestand | Macintosh PICT Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PM4 | Adobe Systems Incorporated | Pagina-indelingsbestand | PageMaker 4 Document | Adobe PageMaker | Adobe Systems Incorporated |
| .PM5 | Adobe Systems Incorporated | Pagina-indelingsbestand | PageMaker 5.0 Document | Adobe PageMaker | Adobe Systems Incorporated |
| .PM6 | Adobe Systems Incorporated | Pagina-indelingsbestand | PageMaker 6.0 Document | Adobe InDesign | Adobe Systems Incorporated |
| .PMD | Adobe Systems Incorporated | Pagina-indelingsbestand | PageMaker Document | Adobe InDesign | Adobe Systems Incorporated |
| .PMI | David Harris | Pagina-indelingsbestand | Pegasus Mail Folder Index | Pegasus Mail | David Harris |
| .PMX | Yu Higuchi | Pagina-indelingsbestand | MikuMikuDance Model File | MikuMikuDance | Yu Higuchi |
| .PNX | David Harris | Pagina-indelingsbestand | Pegasus Mail Draft Message | Pegasus Mail | David Harris |
| .PPP | Serif | Pagina-indelingsbestand | Serif PagePlus Document | PagePlus | Serif |
| .PPX | Serif | Pagina-indelingsbestand | Serif PagePlus Template File | PagePlus | Serif |
| .PR3 | Adobe Systems Incorporated | Pagina-indelingsbestand | Adobe Persuasion V3 Presentation | Adobe Persuasion | Adobe Systems Incorporated |
| .PRA | SofTech, Inc. | Pagina-indelingsbestand | CADRA Design Drafting Software Data | CADRA | SofTech, Inc. |
| .PRN | Various Developers | Pagina-indelingsbestand | HP PCL Printer Output | Canvas X | ACD Systems |
| .PSG | IBM | Pagina-indelingsbestand | Page Segment File | AFP Workbench Viewer | IBM |
| .PSPROJ | Broderbund | Pagina-indelingsbestand | The Print Shop Project File | The Print Shop | Broderbund |
| .PSR | Sybase, Inc | Pagina-indelingsbestand | Powersoft Report File | PowerBuilder | SAP |
| .PTX | Adobe Systems Incorporated | Pagina-indelingsbestand | PageMaker Template File | Adobe InDesign | Adobe Systems Incorporated |
| .PUB | Microsoft Corporation | Pagina-indelingsbestand | Microsoft Publisher Document | LibreOffice | The Document Foundation |
| .PUI | Poster Software, LLC | Pagina-indelingsbestand | Publish-iT Document | Publish-iT | Poster Software, LLC |
| .PWT | Autodesk, Inc. | Pagina-indelingsbestand | AutoCAD Publish To Web Template | Autodesk AutoCAD | Autodesk, Inc. |
| .PZF | GraphPad Software | Pagina-indelingsbestand | GraphPad Prism Project | GraphPad Prism | GraphPad Software |
| .PZFX | GraphPad Software | Pagina-indelingsbestand | GraphPad Prism XML Project | GraphPad Prism | GraphPad Software |
| .PZM | GraphPad Software | Pagina-indelingsbestand | GraphPad Prism Project | GraphPad Prism | GraphPad Software |
| .QDF | Ringler Informatik AG | Pagina-indelingsbestand | Snapform File | Snapform Designer | Ringler Informatik AG |
| .QXB | Quark Software Inc. | Pagina-indelingsbestand | QuarkXPress Book File | QuarkXPress | Quark Software Inc. |
| .QXD | Quark Software Inc. | Pagina-indelingsbestand | QuarkXPress Document | QuarkXPress | Quark Software Inc. |
| .QXT | Quark Software Inc. | Pagina-indelingsbestand | QuarkXPress Template | QuarkXPress | Quark Software Inc. |
| .RAP | Open Source | Pagina-indelingsbestand | Raptor Flowchart File | RAPTOR | Open Source |
| .RB4 | Sarm Software | Pagina-indelingsbestand | Resume Builder 4 File | Sarm Resume Builder | Sarm Software |
| .RELS | Microsoft Corporation | Pagina-indelingsbestand | Open Office XML Relationships File | Microsoft Excel | Microsoft Corporation |
| .REZ | Monolith Productions | Pagina-indelingsbestand | Lithtech Game Engine Resource File | Dragon UnPACKer | Open Source |
| .RFD | Recogniform Technologies | Pagina-indelingsbestand | Recogniform Form Designer File | Recogniform | Recogniform Technologies |
| .RLF | ESRI | Pagina-indelingsbestand | ArcGIS Report Layout File | ESRI ArcGIS for Desktop | ESRI (Environmental Systems Research Institute) |
| .RMR | Individual Software Inc. | Pagina-indelingsbestand | ResumeMaker File | ResumeMaker | Individual Software Inc. |
| .ROW | Digital Rowing | Pagina-indelingsbestand | RowPro Rowfile | RowPro | Digital Rowing |
| .RPC | Synthrone | Pagina-indelingsbestand | Rich Page Content Document | Synthrone Crafter | Synthrone |
| .RPTR | Open Source | Pagina-indelingsbestand | RafflePrinter Document | RafflePrinter | Open Source |
| .RSM | RouterSim | Pagina-indelingsbestand | RouterSim Network Visualizer File | RouterSim CCNA Network Visualizer | RouterSim |
| .RWT | International Reading Association | Pagina-indelingsbestand | ReadWriteThink Timeline | International Reading Association RWT Timeline | International Reading Association |
| .SBK | SwishZone | Pagina-indelingsbestand | SWiSH Project Backup File | SWiSH Max | SwishZone |
| .SBV | Superbase Software | Pagina-indelingsbestand | Superbase Form Definition File | Superbase | Papatuo Holdings Ltd |
| .SDT | Intuit, Inc. | Pagina-indelingsbestand | QuickBooks Data File | Intuit QuickBooks Pro | Intuit, Inc. |
| .SMA | Don Ho | Pagina-indelingsbestand | C/C++ Source Code File | MacroMates TextMate | MacroMates |
| .SNP | Microsoft Corporation | Pagina-indelingsbestand | Access Report Snapshot | Microsoft Access | Microsoft Corporation |
| .SP | Buchanan Computing | Pagina-indelingsbestand | SignPlot Traffic Sign File | SignPlot | Buchanan Computing |
| .SPL | Microsoft Corporation | Pagina-indelingsbestand | Windows Print Spool File | Microsoft Windows | Microsoft Corporation |
| .STUDIO | Silhouette America, inc. | Pagina-indelingsbestand | Silhouette Studio Document | Silhouette Studio | Silhouette America, inc. |
| .STUDIO3 | Silhouette America, inc. | Pagina-indelingsbestand | Silhouette Studio Version 3 Document | Silhouette Studio | Silhouette America, inc. |
| .TP3 | Software Publishing Corporation (SPC) | Pagina-indelingsbestand | Harvard Graphics DOS Template File | Corel Presentations X8 | Corel |
| .TRC | Microsoft Corporation | Pagina-indelingsbestand | SQL Server Trace File | Microsoft SQL Server | Microsoft Corporation |
| .VEW | Novell, Inc. | Pagina-indelingsbestand | GroupWise E-mail View File | GroupWise | Novell, Inc. |
| .VP | Accellera Systems Initiative | Pagina-indelingsbestand | Verilog Encrypted Source Code File | Xilinx ISE WebPACK | Xilinx, Inc. |
| .WLP | Worldlabel | Pagina-indelingsbestand | Worldlabel.com Label Designer File | Label Designer | Worldlabel |
| .WPT | Corel | Pagina-indelingsbestand | WordPerfect Template | Corel WordPerfect X8 | Corel |
| .WTS | Serif | Pagina-indelingsbestand | WebPlus Theme Set | Serif WebPlus | Serif |
| .WWF | World Wide Fund (WWF) | Pagina-indelingsbestand | World Wide Fund Non-Printable Document | Adobe Acrobat DC | Adobe Systems Incorporated |
| .XDW | Fuji Xerox | Pagina-indelingsbestand | Fuji Xerox DocuWorks File | DocuWorks Viewer Light | Fuji Xerox |
| .XIF | Nuance | Pagina-indelingsbestand | ScanSoft Pagis File | ACD Systems ACDSee | ACD Systems |
| .XPS | Microsoft Corporation | Pagina-indelingsbestand | Microsoft XPS (XML Paper Specification) File | Nuance Power PDF Professional | Nuance |
| .XSN | Microsoft Corporation | Pagina-indelingsbestand | InfoPath Form Template File | Microsoft InfoPath | Microsoft Corporation |
| .XTP | adnx | Pagina-indelingsbestand | xTime Project Document | xPlan | adnx |
| .ZDL | Avery Dennison | Pagina-indelingsbestand | Avery DesignPro Label File | Avery Design & Print | Avery Dennison |
| .ZDP | Avery Dennison | Pagina-indelingsbestand | Avery DesignPro Label File | Avery Design & Print | Avery Dennison |
| .ZDS | Avery Dennison | Pagina-indelingsbestand | Avery DesignPro Label File | Avery Design & Print | Avery Dennison |
| .ZFX | zipLogix | Pagina-indelingsbestand | ZipForm File | ZipLogix zipForm Standard | zipLogix |
| .ZNO | Check Point Software Technologies Ltd. | Pagina-indelingsbestand | ZoneAlarm Mailsafe Renamed Data | WinZip | Corel |
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