| or6 | Lotus Organizer 6 Document |
| ort | IBM Rich Text Editor Document |
| osc | OptionScope Worksheet |
| osg | OpenSceneGraph Scene |
| osgb | OpenSceneGraph Binary Scene Data |
| osgt | OpenSceneGraph ASCII Scene Data |
| otc | OpenDocument Chart Template |
| otf | OpenDocument Formula Template |
| oth | OpenDocument HTML Template |
| otln | Opal Outline Document |
| otm | Origin Matrix Book Template |
| otmu | Origin Unicode Matrix Book Template |
| otp | OpenDocument Presentation Template |
| otp | Origin Graph Template |
| otpu | Origin Unicode Template |
| ots | OpenDocument Spreadsheet Template |
| ott | OpenDocument Text Template |
| otw | Origin Worksheet Template |
| otwu | Origin Unicode Worksheet Template |
| otx | Olivetti Olitext Plus Document |
| ov | OrgPlus Chart |
| ov6 | Sharp Printer Overlay Document |
| ove | Overture Musical Score |
| ovex | Overture v5 Score |
| ovp | The Overlay Maker Package |
| ovr | The Overlay Maker Overlay |
| oxps | OpenXPS Document |
| p2d | PointLineCAD 2D Document |
| p2s | PhotoWorks Scene File |
| p3d | PointLineCAD 3D Document |
| p3i | Pixie Document |
| p3l | PointLineCAD 3D Drawing Layer Data |
| p5d | DynaCAD v5 Parts Document |
| p65 | Adobe Pagemaker 6.5 Document |
| p6d | DynaCAD v6 Parts Document |
| p9s | Plane9 Scene |
| pages | Apple Pages Document |
| pages-tef | Apple Pages iCloud Document |
| paper | Dropbox Paper Document |
| partout | PARTOUT Presentation |
| pat | MultiMate Pattern Data |
| pat | PC Stitch Pattern |
| patt | ARToolKit Pattern |
| pb1 | 3D Home Architect Plan |
| pbd | iSilo Document |
| pbf | Digital PhotoBook File |
| pbit | Microsoft Power BI Template |
| pbiviz | Microsoft Power BI Visualisation Data |
| pbix | Microsoft Power BI Report |
| pc | Personal Composer Document |
| pc6 | PowerCADD 6 Drawing |
| pc7 | PowerCADD 7 Drawing |
| pcb | Broderbund PrintMaster Business Card |
| pcbdwf | Altium Designer Draftsman Drawing |
| pcd2 | Pfaff Creative Designer Design |
| pcl | Pencil2D Legacy Document |
| pcl | Printer Command Language Document |
| pclx | Pencil2D Compressed Document |
| pco | PC-Outline Outline |
| pcq | Pfaff Embroidery Document |
| pcr | Broderbund PrintMaster Post Card |
| pcw | PC Write Text Document |
| pd | PipeDream Document |
| pda | PrintShop Deluxe Document |
| pdc | Lizard Safeguard PDF Security Protected PDF |
| pde | ProntoDoc for Excel Document Template |
| pdf | Portable Document Format Document |
| pdfl | Document Manager Locked PDF Document |
| pdfvt | PDF/VT Document |
| pdfx | PDF/X Document |
| pdfxml | Adobe Mars Project Document |
| pdh | ProntoDoc for Word Browser Display Document Template |
| pdl | PrintShop Deluxe Flyer Document |
| pdml | Packet Details Markup Language Document |
| pdms | AVEVA PDMS Document |
| pdo | Pepakura Designer Pattern |
| pdp | Adobe Photoshop PDF File |
| pdq | Patton & Patton Flow Charting FlowPDQ Document |
| pdt | InkWriter/Note Taker Template |
| pdw | Professional Draw Document |
| pdw | ProntoDoc for Word Conventional Document Template |
| pdwr | ProntoDoc for Word Conventional Document |
| pdx | Adobe Acrobat Catalog Index |
| pdz | ProntoDoc for Word Structured Text Document Template |
| peb | ProEST+ Buildings 2009 Document |
| pen | Logitech io2 Drawing |
| pfb | OpenGL Performer Binary Data |
| pfe | Pipe Flow Expert Design Document |
| pff | Formatta Portable Form File |
| pfl | Lotus Freelance Graphics Portfolio Presentation |
| pfs | pfs:Write Text |
| pfsx | ELAN Document |
| pfx | PFS First Choice Word Processor Document |
| pg | C64 Printfox/Pagefox Document |
| pgml | Precision Graphics Markup Language Document |
| pgn | Picatinny Arsenal Electronic Formstore Form Data |
| pgs | DALiM LiTHO Vector Page |
| pgs | PageStream Document |
| phc | Brother Home Embroidery File |
| piskel | Piskel Sprite |
| piz | Pizzicato Music Score |
| pj4 | Davka Writer Hebrew Document |
| pka | PointLineCAD 3D Keyframe Animation |
| pl | Interleaf WorldView Printerleaf Data |
| pl0 | 3D Home Architect Foundation Floor Plan |
| pl1 | 3D Home Architect Floor Plan |
| pl2 | 3D Home Architect Second Level Floor Plan |
| pla | ArchiCAD Project Archive |
| plan | Calligra Plan Document |
| planner | Gnome Planner Document |
| plb | Adobe Premiere 6 Library Data |
| pln | ArchiCAD 3D Model |
| pln | Home Plan Pro Architecture Design |
| pln | Psion Organiser Spreadsheet |
| plot | Gnuplot Script |
| plt | Autodesk AutoCAD Plot Drawing |
| pltx | Cadworx Live Design |
| plz | Lotus Freelance Presentation |
| pm | Adobe PageMaker Document |
| pm3 | Adobe Pagemaker 3 Document |
| pm4 | Adobe Pagemaker 4.0 Document |
| pm5 | Adobe Pagemaker 5.0 Document |
| pm5f | Adobe PageMaker for Mac 5 Document |
| pm6 | Adobe Pagemaker 6.0 Document |
| pm7 | Adobe Pagemaker 7 Document |
| pmap | Pocket Mindmap Document |
| pmapz | Pocket Mindmap Compressed Mindmap |
| pmd | Adobe Pagemaker 7.0 Document |
| pmd | PlanMaker Spreadsheet Document |
| pmdx | PlanMaker Spreadsheet |
| pmg | Adobe Pagemaker Group |
| pmk | ArchiCAD PlotMaker Document |
| pml | PADGen Program Info |
| pmo | Pegasus Mail Saved Message |
| pmt | Adobe Pagemaker 7.0 Template |
| pmv | PlanMaker Spreadsheet Template |
| pmvx | PlanMaker 2018 Spreadsheet Template |
| pmw | Pegasus Mail Outgoing Draft Message |
| pmw | PlanMaker 97 Spreadsheet Document |
| pmx | Pegasus Mail Outgoing Final Message |
| pn2 | ParsNegar 2 Document |
| pne | ArchiCAD Educational Document |
| png | Corel Paint Shop Pro Browser Catalogue |
| pnr | Peernet Label Designer Document |
| pnrx | Novell File Reporter File Viewer Document |
| pnx | Pegasus Mail Draft Message |
| pot | Microsoft PowerPoint Template |
| pothtml | Microsoft PowerPoint 2007 HTML Template |
| potm | Microsoft PowerPoint 2007 Template |
| potx | Microsoft PowerPoint 2007 Template |
| pov | POV-Ray Raytracing Format |
| ppam | Microsoft PowerPoint 2007 Add-in |
| ppax | Microsoft PowerPoint 2007 Add-in |
| ppb | Serif PagePlus Bookplus Document |
| ppdf | Microsoft RMS Protected PDF |
| ppml | Personalized Print Markup Language Document |
| ppnt | Microsoft PowerPoint for Mac Presentation |
| ppot | Microsoft PowerPoint for Mac Template |
| ppp | Parson Power Publisher Document |
| ppp | Serif PagePlus Publication |
| pps | Microsoft PowerPoint Slideshow |
| ppsm | Microsoft PowerPoint 2007 Slideshow |
| ppsx | Microsoft PowerPoint 2007 Slideshow |
| ppt | Microsoft PowerPoint Presentation |
| ppt3 | Microsoft PowerPoint 3 for Mac Presentation |
| ppta | Articulate Presenter Document |
| ppte | Document Manager Encrypted PowerPoint Presentation |
| ppthtml | Microsoft PowerPoint HTML Presentation |
| pptl | Document Manager Locked PowerPoint Presentation |
| pptm | Microsoft PowerPoint 2007 Presentation |
| pptt | OnlyOffice Internal PPTX Document |
| pptx | Microsoft PowerPoint 2007 Presentation |
| pptxml | Microsoft PowerPoint XML Presentation |
| ppv | Pocket PowerPoint Document |
| ppv | Vox Proxy Animated Powerpoint Presentation |
| ppx | Serif PagePlus Template |
| pr3 | Adobe Persuasion v3 Presentation |
| pr4 | Harvard Graphics Presentation |
| pra | CADRA Design Drafting Software Data |
| prbak | SoftMaker Presentations Document Backup |
| prdx | SoftMaker Presentations Document |
| presto | Presto Project Spreadsheet |
| prf | Monarch Portable Report |
| prjdoc | Altium Designer PCB Document |
| prn | Printer Text File |
| pro | Adobe Proto Design |
| pro | Turbo FloorPlan 3D Design |
| pro4 | ProPresenter 4 Document |
| pro4dvd | ProPresenter 4 DVD Clip |
| pro4pl | ProPresenter 4 Playlist File |
| pro4plx | ProPresenter 4 Playlist Bundle |
| pro4x | ProPresenter 4 Bundle |
| pro5 | ProPresenter 5 Document |
| pro5dvd | ProPresenter 5 DVD Clip |
| pro5pl | ProPresenter 5 Playlist File |
| pro5plx | ProPresenter 5 Bundled with Playlist File |
| pro5template | ProPresenter 5 Template |
| pro5x | ProPresenter 5 Bundle File |
| pro6 | ProPresenter 6 Document |
| pro6x | ProPresenter 6 Bundle |
| proqc | ProPresenter 4 Quartz Composition |
| prs | Lotus Freelance Graphics Presentation Data |
| prs2 | Adobe Persuasion v2 Presentation |
| prsx | SoftMaker Presentations Slide Show |
| prt | CADKEY Part Document |
| prt | Corel Presentations Template |
| prt | Solid Edge Parts Document |
| prt2 | Adobe Persuasion Template |
| prtl | Adobe Premiere Title Template |
| prvx | SoftMaker Presentations Document Template |
| ps5 | ProSteel 5 Document |
| psh | ProShow Producer Slideshow |
| psip | Microsoft Works 1.1 for Mac Document |
| psm | SiSense Prism Document |
| psm | Solid Edge Sheet Metal Document |
| psmd | PrintShop Mail Document |
| psmt | PrintShop Mail Template |
| psp | Scitor Project Scheduler Planning File |
| psq | Adobe Premiere 6 Storyboard |
| pss | Pocket SlideShow Presentation |
| pss | Pod SnapShot |
| pst | ProShow Producer Template |
| psu | PSU Designer Document |
| psw | Pocket Word Document |
| psz | Compressed PostScript |
| pt | PTab Spreadsheet Document |
| pt3 | Adobe Pagemaker 3.0 Template |
| pt4 | Adobe Pagemaker 4.0 Template |
| pt5 | Adobe PageMaker 5.0 Template |
| pt6 | Adobe PageMaker 6.0 Template |
| ptb | Power Tab Editor Tabulature |
| ptb | Pro/ENGINEER Pattern Table |
| ptf | Scrapbook Flair Template |
| ptk | PTOCA Format Data |
| ptk | Puntotek Embroidery Design Document |
| ptn | DigiStitch Design |
| ptnx | EasyBeadPatterns Pattern |
| ptt | Context4 Print Data |
| ptw | Autodesk AutoCAD Publish to Web File |
| ptx | Adobe Pagemaker Template |
| ptx | E-Transcript Document |
| ptz | E-Transcript Bundle |
| pu | PlantUML Document |
| pub | Corel Ventura Publisher Publication |
| pub | Microsoft Publisher Document |
| pub | Print Perfect Gold Template |
| pubhtml | Microsoft Publisher HTML Document |
| publication | Twixl Publisher Publication |
| pubmhtml | Microsoft Publisher Archived HTML |
| pui | Publish-It Document |