| .P16 | HERE | Audiobestanden | HERE Maps For Android Map Data Package | HERE Maps | HERE |
| .PAC | NetScape | Audiobestanden | Proxy Auto-Config File | Internet Explorer | Microsoft Corporation |
| .PAT | Autodesk, Inc. | Audiobestanden | AutoCAD Hatch Pattern File | Autodesk AutoCAD | Autodesk, Inc. |
| .PBF | Paragon Software Group | Audiobestanden | Paragon Backup File | Paragon Backup & Recovery | Paragon Software Group |
| .PCA | Sony | Audiobestanden | Perfect Clarity Audio File | ACID Pro 7 | Magix Software GmbH |
| .PCG | Korg | Audiobestanden | Korg Instrument Bank File | Awave Studio | FMJ-Software |
| .PCH2 | Nord | Audiobestanden | Nord Modular G2 Patch | Modular G2 | Nord |
| .PCM | Various Developers | Audiobestanden | Pulse Code Modulation | MPlayer | The MPlayer Team |
| .PD | SAI | Audiobestanden | FlexiSIGN 5 Plotter Document | FlexiSIGN | SAI |
| .PEK | Adobe Systems Incorporated | Audiobestanden | Adobe Peak Waveform File | Adobe Premiere Pro CC | Adobe Systems Incorporated |
| .PEPPER | Pepper Computer | Audiobestanden | Pepper Keeper Shared Package File | Pepper Keeper | Pepper Computer |
| .PHO | Ucamco | Audiobestanden | Gerber Photoplot File | Altium Designer | Altium |
| .PHR | Adobe Systems Incorporated | Audiobestanden | RoboHelp Phrase List | Adobe RoboHelp | Adobe Systems Incorporated |
| .PHY | Autodesk, Inc. | Audiobestanden | 3ds Max Physique File | Autodesk 3ds Max | Autodesk, Inc. |
| .PJR | LabDV | Audiobestanden | DVDx Project File | DVDx | LabDV |
| .PK | Adobe Systems Incorporated | Audiobestanden | Audition Peak File | Adobe Audition | Adobe Systems Incorporated |
| .PKF | Adobe Systems Incorporated | Audiobestanden | Audition Peak File | Adobe Audition | Adobe Systems Incorporated |
| .PLA | SanDisk Corporation | Audiobestanden | Sansa Playlist File | Playlist Manager | Sprintbit Software |
| .PLM | FMJ-Software | Audiobestanden | DisorderTracker2 Module | Awave Studio | FMJ-Software |
| .PLS | Various Developers | Audiobestanden | Audio Playlist | VLC Media Player | VideoLAN |
| .PLY | MakeMusic, Inc. | Audiobestanden | Finale Playback File | Finale | MakeMusic, Inc. |
| .PNA | PhatNoise (Harman International) | Audiobestanden | PhatNoise Audio File | PhatNoise Music Manager | PhatNoise (Harman International) |
| .PNO | Microsoft Corporation | Audiobestanden | Windows 8 Piano Song | Microsoft Windows 8 | Microsoft Corporation |
| .PPC | Garmin | Audiobestanden | XMap Flight Plan Statistic File | XMap | Garmin |
| .PRG | Open Source | Audiobestanden | Program File | Notepad++ | Don Ho |
| .PSF | Adobe Systems Incorporated | Audiobestanden | Photoshop Proof Settings File | Adobe Photoshop Elements | Adobe Systems Incorporated |
| .PSI | SAPIEN Technologies | Audiobestanden | PrimalScript Online Help Shortcut | PrimalScript | SAPIEN Technologies |
| .PSM | Embarcadero Technologies | Audiobestanden | Turbo Pascal Symbol Table Of IDE | Turbo Pascal | Embarcadero Technologies |
| .PSY | Open Source | Audiobestanden | Psycle Song File | Psycle | Open Source |
| .PT3 | Harvard Graphics | Audiobestanden | Harvard Device Driver File | Harvard Graphics ChartXL | Harvard Graphics |
| .PTF | Sony | Audiobestanden | PSP Theme File | PSP Theme Toolbox | Unknown Developer |
| .PTM | Microsoft Corporation | Audiobestanden | MapPoint Map File | Microsoft MapPoint | Microsoft Corporation |
| .PTS | Avid Technology | Audiobestanden | Pro Tools Session | Avid Pro Tools | Avid Technology |
| .PTT | Avid Technology | Audiobestanden | Pro Tools Session Template | Avid Pro Tools | Avid Technology |
| .PTX | Adobe Systems Incorporated | Audiobestanden | PageMaker Template File | Adobe InDesign | Adobe Systems Incorporated |
| .PUI | Poster Software, LLC | Audiobestanden | Publish-iT Document | Publish-iT | Poster Software, LLC |
| .PVC | Panasonic Corporation | Audiobestanden | Panasonic VM1 Voice File | Panasonic Mini Player (VS2_VM1_Player.exe) | Panasonic Corporation |
| .PYA | Microsoft Corporation | Audiobestanden | Microsoft PlayReady DRM Audio File | Microsoft Windows Media Player | Microsoft Corporation |
| .PYV | Microsoft Corporation | Audiobestanden | Microsoft PlayReady Video | PlayReady | Microsoft Corporation |
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