| .P12 | RSA Laboratories | Web-tiedostot | Personal Information Exchange File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .P3E | Adobe Systems Incorporated | Asetustiedostot | Photoshop Repousse Settings File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .P3L | Adobe Systems Incorporated | Datatiedostot | Adobe Photoshop Light Preset File | Adobe Photoshop | Adobe Systems Incorporated |
| .P65 | Adobe Systems Incorporated | Sivun asettelutiedostot | Adobe PageMaker 6.5 Document | Adobe InDesign | Adobe Systems Incorporated |
| .P7B | Microsoft Corporation | Web-tiedostot | PKCS #7 Certificate File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .P7C | Microsoft Corporation | Web-tiedostot | PKCS #7 Certificate File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PAM | Open Source | Rasterikuvatiedostot | Portable Arbitrary Map | Adobe Photoshop | Adobe Systems Incorporated |
| .PAR | Siemens PLM Software | CAD-tiedostot | Solid Edge Part File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PAT | Autodesk, Inc. | CAD-tiedostot | AutoCAD Hatch Pattern File | Adobe Photoshop | Adobe Systems Incorporated |
| .PBK | Microsoft Corporation | Datatiedostot | Dial-Up Phone Book File | Adobe Pixel Bender Toolkit | Adobe Systems Incorporated |
| .PBM | Unknown Developer | Rasterikuvatiedostot | Portable Bitmap Image | Adobe Photoshop CC | Adobe Systems Incorporated |
| .PCD | PokéCheats | Pelitiedostot | Pokémon Wonder Card File | Adobe Photoshop | Adobe Systems Incorporated |
| .PCM | Various Developers | Äänitiedostot | Pulse Code Modulation | Adobe Audition | Adobe Systems Incorporated |
| .PCT | Apple | Sivun asettelutiedostot | Macintosh PICT Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PCX | ZSoft Corporation | Rasterikuvatiedostot | Paintbrush Bitmap Image File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PDD | Adobe Systems Incorporated | Rasterikuvatiedostot | Adobe PhotoDeluxe Image | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PDF | Adobe Systems Incorporated | Sivun asettelutiedostot | Portable Document Format File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PDP | Palo Alto Software | Asetustiedostot | Palo Alto Software Plan Component File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PDX | Adobe Systems Incorporated | Datatiedostot | Adobe Acrobat Index File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PEAK | Adobe Systems Incorporated | Datatiedostot | Adobe Soundbooth Peak Data | Adobe Soundbooth | Adobe Systems Incorporated |
| .PEF | Pentax | Kameran Raakatiedostot | Pentax Digital Camera Raw Image Format | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PEK | Adobe Systems Incorporated | Äänitiedostot | Adobe Peak Waveform File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PFM | Adobe Systems Incorporated | Fonttitiedostot | Printer Font Metrics File | Adobe Type Manager | Adobe Systems Incorporated |
| .PFX | Various Developers | Järjestelmätiedostot | PKCS #12 Certificate File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PGM | Jef Poskanzer | Rasterikuvatiedostot | Portable Gray Map Image | Adobe Photoshop | Adobe Systems Incorporated |
| .PHP | Panic | Web-tiedostot | PHP Source Code File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PHP2 | Open Source | Web-tiedostot | PHP 2 Web Page | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PHP3 | Open Source | Web-tiedostot | PHP 3 Web Page | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PHP4 | Open Source | Web-tiedostot | PHP 4 Web Page | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PHP5 | Open Source | Web-tiedostot | PHP 5 Web Page | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PHR | Adobe Systems Incorporated | Datatiedostot | RoboHelp Phrase List | Adobe RoboHelp | Adobe Systems Incorporated |
| .PHT | Microsoft Corporation | Web-tiedostot | Partial Hypertext | Adobe Contribute 6.5 | Adobe Systems Incorporated |
| .PICT | Apple | Sivun asettelutiedostot | Macintosh PICT Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PIP | Microsoft Corporation | Asetustiedostot | Office Personalized Settings File | Adobe Photoshop | Adobe Systems Incorporated |
| .PIXAR | Pixar | Rasterikuvatiedostot | Pixar Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PJP | Joint Photographic Experts Group | Rasterikuvatiedostot | JPEG Image | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PJPEG | Microsoft Corporation | Rasterikuvatiedostot | Progressive JPEG Image | Adobe Photoshop | Adobe Systems Incorporated |
| .PK | Adobe Systems Incorporated | Äänitiedostot | Audition Peak File | Adobe Audition | Adobe Systems Incorporated |
| .PKF | Adobe Systems Incorporated | Äänitiedostot | Audition Peak File | Adobe Audition | Adobe Systems Incorporated |
| .PLB | Microsoft Corporation | Datatiedostot | Microsoft Robotics Developer Studio Playback Data | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PLUGIN | Adobe Systems Incorporated | Laajennustiedostot | Adobe Photoshop Plugin | Adobe Photoshop | Adobe Systems Incorporated |
| .PM3 | Crouzet | CAD-tiedostot | Crouzet Logic Software M3 File | Adobe InDesign | Adobe Systems Incorporated |
| .PM4 | Adobe Systems Incorporated | Sivun asettelutiedostot | PageMaker 4 Document | Adobe PageMaker | Adobe Systems Incorporated |
| .PM5 | Adobe Systems Incorporated | Sivun asettelutiedostot | PageMaker 5.0 Document | Adobe PageMaker | Adobe Systems Incorporated |
| .PM6 | Adobe Systems Incorporated | Sivun asettelutiedostot | PageMaker 6.0 Document | Adobe InDesign | Adobe Systems Incorporated |
| .PM7 | Adobe Systems Incorporated | Datatiedostot | Adobe PageMaker 7 Document | Adobe PageMaker | Adobe Systems Incorporated |
| .PMD | Adobe Systems Incorporated | Sivun asettelutiedostot | PageMaker Document | Adobe InDesign | Adobe Systems Incorporated |
| .PMG | Adobe Systems Incorporated | Vektorikuvatiedostot | PageMaker Group File | Adobe InDesign | Adobe Systems Incorporated |
| .PMT | Adobe Systems Incorporated | Fonttitiedostot | PageMaker Template File | Adobe InDesign | Adobe Systems Incorporated |
| .PMX | Yu Higuchi | 3D-kuvatiedostot | MikuMikuDance Model File | Adobe PageMaker | Adobe Systems Incorporated |
| .PNG | The Pixelmator Team | Rasterikuvatiedostot | Portable Network Graphics | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PNM | XnSoft | Rasterikuvatiedostot | Portable Any Map Image | Adobe Photoshop CC | Adobe Systems Incorporated |
| .PNTG | Apple | Rasterikuvatiedostot | MacPaint Graphic File | Adobe Flash Professional CC | Adobe Systems Incorporated |
| .POP | Valve | Pelitiedostot | Team Fortress 2 Population File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .PPD | Adobe Systems Incorporated | Järjestelmätiedostot | PostScript Printer Description File | Adobe PageMaker | Adobe Systems Incorporated |
| .PPJ | Adobe Systems Incorporated | Videotiedostot | Premiere 6 Project File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PPM | The GIMP Development Team | Rasterikuvatiedostot | Portable Pixmap Image File | Adobe Photoshop | Adobe Systems Incorporated |
| .PQ | Eric Fredricksen | Pelitiedostot | Progress Quest Save File | Adobe PageMaker | Adobe Systems Incorporated |
| .PR3 | Adobe Systems Incorporated | Sivun asettelutiedostot | Adobe Persuasion V3 Presentation | Adobe Persuasion | Adobe Systems Incorporated |
| .PRA | SofTech, Inc. | CAD-tiedostot | CADRA Design Drafting Software Data | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PRC | Adobe Systems Incorporated | 3D-kuvatiedostot | Product Representation Compact File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PREF | Unknown Developer | Asetustiedostot | Preferences File | Adobe Device Central | Adobe Systems Incorporated |
| .PREFS | VectorStorm | Pelitiedostot | MMORPG Tycoon Preferences File | Adobe Soundbooth | Adobe Systems Incorporated |
| .PREL | Adobe Systems Incorporated | Videotiedostot | Premiere Elements Project File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PRF | Microsoft Corporation | Asetustiedostot | Outlook Profile File | Adobe Director | Adobe Systems Incorporated |
| .PRM | Unknown Developer | Asetustiedostot | Parameter File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PRO | Adobe Systems Incorporated | Web-tiedostot | Adobe Proto Design File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PRPRESET | Adobe Systems Incorporated | Datatiedostot | Adobe Premiere Preset | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PRPROJ | Adobe Systems Incorporated | Videotiedostot | Premiere Pro Project | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PRT | PTC | CAD-tiedostot | Pro/ENGINEER Part File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PRTL | Adobe Systems Incorporated | Videotiedostot | Premiere Pro Title File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PS | Adobe Systems Incorporated | Vektorikuvatiedostot | PostScript File Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PSA | Epic Games | 3D-kuvatiedostot | Unreal Engine Skeletal Animation File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PSB | Adobe Systems Incorporated | Rasterikuvatiedostot | Adobe PhotoShop Big File | Adobe Photoshop | Adobe Systems Incorporated |
| .PSD | Adobe Systems Incorporated | Rasterikuvatiedostot | Adobe Photoshop Document | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PSE | Adobe Systems Incorporated | Rasterikuvatiedostot | Photoshop Elements Photo Project | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PSET | Adobe Systems Incorporated | Laajennustiedostot | Adobe InDesign Plug-in Set File | Adobe InDesign | Adobe Systems Incorporated |
| .PSF | Adobe Systems Incorporated | Asetustiedostot | Photoshop Proof Settings File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PSID | Adobe Systems Incorporated | Vektorikuvatiedostot | PostScript Image Data File | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PSP | Corel Corporation | Rasterikuvatiedostot | PaintShop Pro Image | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PT3 | Harvard Graphics | Harvinaiset Tiedostot | Harvard Device Driver File | Adobe PageMaker | Adobe Systems Incorporated |
| .PT4 | Adobe Systems Incorporated | Tekstitiedostot | Adobe PageMaker 4 Template | Adobe PageMaker | Adobe Systems Incorporated |
| .PT5 | Adobe Systems Incorporated | Tekstitiedostot | PageMaker 5.0 Template File | Adobe PageMaker | Adobe Systems Incorporated |
| .PTX | Adobe Systems Incorporated | Fonttitiedostot | PageMaker Template File | Adobe InDesign | Adobe Systems Incorporated |
| .PUB | Microsoft Corporation | Sivun asettelutiedostot | Microsoft Publisher Document | Adobe InDesign | Adobe Systems Incorporated |
| .PXR | Pixar | Rasterikuvatiedostot | Pixar Image File | Adobe Photoshop Elements | Adobe Systems Incorporated |
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