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