| .PAGES | Apple | Textové soubory | Apple Pages Document | LibreOffice | The Document Foundation |
| .PCO | Unknown Developer | Textové soubory | PC-Outline Outline | Unknown Software | Unknown Developer |
| .PCW | Bob Wallance | Textové soubory | PC Write Text Document | PC-Writer | Bob Wallance |
| .PDL | PDL Developerment Team | Textové soubory | Perl Data Language File | perldl | Open Source |
| .PDQ | Patton & Patton Software | Textové soubory | Flow Charting PDQ File | Flow Charting | Patton & Patton Software |
| .PDU | Unknown Developer | Textové soubory | Protocol Data Unit Message | Apple TextEdit | Apple |
| .PFX | Various Developers | Textové soubory | PKCS #12 Certificate File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PGW | Sublime HQ Pty Ltd | Textové soubory | Map World File | Sublime Text | Sublime HQ Pty Ltd |
| .PJT | Golden Software LLC | Textové soubory | Didger Project File | Golden Software Didger | Golden Software LLC |
| .PMO | Broderbund | Textové soubory | Print Meta Object File | Broderbund PrintMaster v7 Platinum | Broderbund |
| .PMP | Autodesk, Inc. | Textové soubory | AutoCAD Plot Model Parameter File | Autodesk AutoCAD | Autodesk, Inc. |
| .PMX | Yu Higuchi | Textové soubory | MikuMikuDance Model File | MikuMikuDance | Yu Higuchi |
| .PN2 | Tooraj Enayati | Textové soubory | ParsNegar II Document File | ParsNegar | Tooraj Enayati |
| .PNR | PEERNET Inc. | Textové soubory | PEERNET Label Designer File | Peernet Label Designer | PEERNET Inc. |
| .PPD | Adobe Systems Incorporated | Textové soubory | PostScript Printer Description File | Adobe PageMaker | Adobe Systems Incorporated |
| .PPG | Microsoft Corporation | Textové soubory | Microsoft PowerPoint Presentation | Microsoft PowerPoint | Microsoft Corporation |
| .PRN | Various Developers | Textové soubory | HP PCL Printer Output | Canvas X | ACD Systems |
| .PRT | PTC | Textové soubory | Pro/ENGINEER Part File | Autodesk Fusion 360 | Autodesk, Inc. |
| .PSW | Microsoft Corporation | Textové soubory | Windows Password Reset Disk File | Password Reset Disk | Microsoft Corporation |
| .PT | Open Source | Textové soubory | Zope Page Template | Zope | Open Source |
| .PT3 | Harvard Graphics | Textové soubory | Harvard Device Driver File | Harvard Graphics ChartXL | Harvard Graphics |
| .PT4 | Adobe Systems Incorporated | Textové soubory | Adobe PageMaker 4 Template | Adobe PageMaker | Adobe Systems Incorporated |
| .PT5 | Adobe Systems Incorporated | Textové soubory | PageMaker 5.0 Template File | Adobe PageMaker | Adobe Systems Incorporated |
| .PTL | IBM | Textové soubory | Rational Rose Petal File | IBM Rational Rose development software | IBM |
| .PUB | Microsoft Corporation | Textové soubory | Microsoft Publisher Document | LibreOffice | The Document Foundation |
| .PVM | Parallels | Textové soubory | Parallels Virtual Machine | VMware Fusion | VMware |
| .PWD | Microsoft Corporation | Textové soubory | Microsoft Pocket Word Document | Softmaker Office | SoftMaker Software |
| .PWI | Microsoft Corporation | Textové soubory | Pocket Word Document | Apache OpenOffice | Apache Software Foundation |
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