| .PAR | Siemens PLM Software | CAD檔案 | Solid Edge Part File | Apache OpenOffice | Apache Software Foundation |
| .PBA | Oracle Corporation | 插件檔案 | OpenOffice.org Basic Protected Module File | Apache OpenOffice | Apache Software Foundation |
| .PCD | PokéCheats | 遊戲檔案 | Pokémon Wonder Card File | Apache OpenOffice | Apache Software Foundation |
| .PHTML | Opera Software | 網絡文件 | PHP Web Page | Apache Tomcat | Apache Software Foundation |
| .PMK | David Harris | 設置檔案 | Pegasus Mail Keyboard Settings | Apache OpenOffice | Apache Software Foundation |
| .PO | Sublime HQ Pty Ltd | 開發商檔案 | Portable Object | Apache OpenOffice | Apache Software Foundation |
| .POM | Apache Software Foundation | 不常見的文件 | Maven Build File | Maven | Apache Software Foundation |
| .POT | Microsoft Corporation | 資料檔案 | PowerPoint Template | Apache OpenOffice | Apache Software Foundation |
| .POTX | Microsoft Corporation | 資料檔案 | PowerPoint Open XML Presentation Template | OpenOffice Impress | Apache Software Foundation |
| .PPS | Microsoft Corporation | 資料檔案 | PowerPoint Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPSX | Microsoft Corporation | 資料檔案 | PowerPoint Open XML Slide Show | Apache OpenOffice | Apache Software Foundation |
| .PPT | Microsoft Corporation | 資料檔案 | PowerPoint Presentation | Apache OpenOffice | Apache Software Foundation |
| .PPTX | Microsoft Corporation | 資料檔案 | PowerPoint Open XML Presentation | Apache OpenOffice | Apache Software Foundation |
| .PRG | Open Source | 可執行檔案 | Program File | OpenOffice Writer | Apache Software Foundation |
| .PSV | Sony | 遊戲檔案 | PlayStation 2 Save File | Apache OpenOffice | Apache Software Foundation |
| .PSW | Microsoft Corporation | 不常見的文件 | Windows Password Reset Disk File | Apache OpenOffice | Apache Software Foundation |
| .PWI | Microsoft Corporation | 文字檔 | Pocket Word Document | Apache OpenOffice | Apache Software Foundation |
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