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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .P000 | Runewaker Entertainment | Game Files | Dragon's Prophet Game Data | Dragon's Prophet | Runewaker Entertainment |
| .P2M | Dassault Systèmes | Game Files | PhotoWorks Appearance File | SFW PhotoWorks | Seattle Lab |
| .P3T | Sony | Game Files | PlayStation 3 Theme File | P3T Unpacker | Open Source |
| .P8 | Lexaloffle Games | Game Files | PICO-8 Data | PICO-8 | Lexaloffle Games |
| .PACK | neOceane | Game Files | CustoPack Tools Theme Pack | CustoPack Tools | neOceane |
| .PACKAGE | Electronic Arts | Game Files | Electronic Arts Game Package File | Electronic Arts The Sims 2 | Electronic Arts |
| .PACKED | Codemasters | Game Files | Jericho Game Data | Clive Barker's Jericho | Codemasters |
| .PAK | Unknown Developer | Game Files | Video Game Package | Dragon UnPACKer | Open Source |
| .PAR | Siemens PLM Software | Game Files | Solid Edge Part File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PAT | Autodesk, Inc. | Game Files | AutoCAD Hatch Pattern File | Autodesk AutoCAD | Autodesk, Inc. |
| .PAZ | PEARL FOUNDATION | Game Files | Black Desert Game Data | Black Desert Online | PEARL FOUNDATION |
| .PBN | Open Source | Game Files | Portable Bridge Notation File | RoboBridge | Open Source |
| .PBO | Bohemia Interactive | Game Files | Packed Bohemia Object | ArmA: Armed Assault | Bohemia Interactive |
| .PBP | Sony | Game Files | PSP Firmware Update File | PBP Unpacker | Unknown Developer |
| .PCC | Electronic Arts | Game Files | Mass Effect Package | Mass Effect 3 | BioWare |
| .PCD | PokéCheats | Game Files | Pokémon Wonder Card File | Pokesav | PokéCheats |
| .PCE | Open Source | Game Files | TurboGrafx-16 ROM | Magic Engine | Open Source |
| .PCF | Blackstrip Studios | Game Files | PaintCAD Font | PaintCAD | Blackstrip Studios |
| .PCK | Microsoft Corporation | Game Files | System Center Configuration Manager Package File | Microsoft system center configuration manager | Microsoft Corporation |
| .PCP | Microsoft Corporation | Game Files | Windows Installer Patch Creation Properties File | Microsoft Windows SDK | Microsoft Corporation |
| .PDA | Molecular Devices | Game Files | SoftMax Pro Microplate Data Analysis File | SoftMax Pro | Molecular Devices |
| .PDT | Microsoft Corporation | Game Files | InkWriter Note Taker Template File | Windows Mobile | Microsoft Corporation |
| .PEG | PopCap Games | Game Files | Peggle Replay File | Peggle | PopCap Games |
| .PEO | Relic Entertainment | Game Files | Homeworld MESH File | Homeworld | Relic Entertainment |
| .PER | Microsoft Corporation | Game Files | Age Of Empires Personality File | Microsoft Notepad | Microsoft Corporation |
| .PFF | Access | Game Files | Formatta Portable Form File | Access Formatta Filler | Access |
| .PGB | Ubisoft | Game Files | Rayman 2 Game Data | Rayman 2: The Great Escape | Ubisoft |
| .PGE | Open Source | Game Files | PocketGrandmaster Engine File | PocketGrandmaster | Open Source |
| .PGN | Unknown Developer | Game Files | Portable Game Notation File | Fritz | Open Source |
| .PGT | Open Source | Game Files | Pokémon Gift File | Pokesav | PokéCheats |
| .PHE | Open Source | Game Files | WinChess Game Record | WinChess | Open Source |
| .PHN | Algoryx Simulation | Game Files | Algodoo Phun Phunlet | Algoryx Algodoo - Phun Edition | Algoryx Simulation |
| .PHX | Runtime Games Ltd | Game Files | Phoenix RC Simulator Update File | Phoenix RC Simulator | Runtime Games Ltd |
| .PHYSAO | Marathon Open Source | Game Files | Physics Model | Aleph One | Marathon Open Source |
| .PHZ | Algoryx Simulation | Game Files | Algodoo Phun Compressed Phunlet | Phun | Open Source |
| .PIG | Interplay Entertainment | Game Files | Descent Texture File | Interplay Descent 2 | Interplay Entertainment |
| .PIGG | NCSoft | Game Files | City Of Heroes Data | City of Heroes | NCSoft |
| .PIZ | Winrar | Game Files | Zipped File | 7-Zip | Igor Pavlov |
| .PJ | Open Source | Game Files | Project64 Saved State File | Project64 | Open Source |
| .PK3 | id Software | Game Files | Quake 3 Engine Game Data File | 7-Zip | Igor Pavlov |
| .PK4 | id Software | Game Files | Doom 3 Engine Game Data File | Corel WinZip 21 | Corel |
| .PKG | Apple | Game Files | Apple MacOS Installer Package | macOS | Apple |
| .PKM | Various Developers | Game Files | Pokémon Saved Game Data File | Pokesav | PokéCheats |
| .PKR | Symantec Corporation | Game Files | Pretty Good Privacy Public Keyring | Pretty Good Privacy (PGP) | Symantec Corporation |
| .PKX | IBM | Game Files | Rational XDE Data | Rational Rose | IBM |
| .PKZ | Piboso | Game Files | Kart Racing Pro Track Data | Kart Racing Pro | Piboso |
| .PLAYER | Re-Logic | Game Files | Terraria Mobile Player File | Re-Logic Terraria | Re-Logic |
| .PLF | Papyrus Services | Game Files | Papyrus License File | Papyrus II | Papyrus Services |
| .PLN | Microsoft Corporation | Game Files | Flight Simulator Flight Plan | Microsoft Flight Simulator | Microsoft Corporation |
| .PLR | Re-Logic | Game Files | Terraria Player File | Terraria | Re-Logic |
| .PLV | Magix Software GmbH | Game Files | Digital Foto Maker Data | MAGIX Digital Foto Maker | Magix Software GmbH |
| .PMU | David Harris | Game Files | Pegasus Mail Keyboard Macro | Pegasus Mail | David Harris |
| .PNB | Open Source | Game Files | Pokemon NetBattle Data | Pokemon NetBattle | Open Source |
| .POD | Terminal Reality | Game Files | Terminal Reality Game Data File | Dragon UnPACKer | Open Source |
| .POF | Interplay Entertainment | Game Files | Descent Robot Definition File | Descent 3 | Interplay Entertainment |
| .POG | Interplay Entertainment | Game Files | Descent 2 Texture Modification | Interplay Descent 2 | Interplay Entertainment |
| .POP | Valve | Game Files | Team Fortress 2 Population File | Team Fortress 2 | Valve |
| .PPE | GSC Game World | Game Files | S.T.A.L.K.E.R. Post-process Effector File | S.T.A.L.K.E.R | GSC Game World |
| .PPF | Corel | Game Files | Picture Publisher Image File | CorelDRAW Graphics Suite | Corel |
| .PPT | Microsoft Corporation | Game Files | PowerPoint Presentation | Apache OpenOffice | Apache Software Foundation |
| .PQ | Eric Fredricksen | Game Files | Progress Quest Save File | Progress Quest | Eric Fredricksen |
| .PQHERO | Infinite Interactive | Game Files | Puzzle Quest Saved Game | Puzzle Quest: Challenge of the Warlords | Infinite Interactive |
| .PR3 | Adobe Systems Incorporated | Game Files | Adobe Persuasion V3 Presentation | Adobe Persuasion | Adobe Systems Incorporated |
| .PRD | SoftMaker Software | Game Files | SoftMaker Presentations Document | Softmaker Office | SoftMaker Software |
| .PREFS | VectorStorm | Game Files | MMORPG Tycoon Preferences File | Eclipse CDT | The Eclipse Foundation |
| .PRG | Open Source | Game Files | Program File | Notepad++ | Don Ho |
| .PRK | LucasArts Entertainment Company, LLC | Game Files | Thrillville Park File | Thrillville | Frontier Developments plc |
| .PROFILE | GNU Operating System | Game Files | Bash Shell Profile | MacroMates TextMate | MacroMates |
| .PROPERTIES | Mojang | Game Files | Minecraft Properties File | Microsoft Notepad | Microsoft Corporation |
| .PRX | Microsoft Corporation | Game Files | FoxPro Compiled Program | Microsoft Visual FoxPro | Microsoft Corporation |
| .PS2 | Datel | Game Files | Sharkport Saved Game File | PS2 Save Builder | Interscape |
| .PSN | OptionVue Systems International | Game Files | OptionVue Portfolio Manager Positions Data | OptionVue | OptionVue Systems International |
| .PSS | Autodesk, Inc. | Game Files | AutoCAD Plot Stamp Settings File | Autodesk AutoCAD | Autodesk, Inc. |
| .PSSG | Codemasters | Game Files | EGO Engine Textures File | DiRT Rally | Codemasters |
| .PSV | Sony | Game Files | PlayStation 2 Save File | PSV Exporter | Open Source |
| .PSX | Sony | Game Files | PlayStation Save File | PSXGameEdit | Open Source |
| .PTG | Pearson | Game Files | PowerTeacher Gradebook Configuration File | PowerTeacher Gradebook | Pearson |
| .PTM | Microsoft Corporation | Game Files | MapPoint Map File | Microsoft MapPoint | Microsoft Corporation |
| .PTS | Avid Technology | Game Files | Pro Tools Session | Avid Pro Tools | Avid Technology |
| .PTU | NovaLogic | Game Files | Nova Logic Effects Definition File | Delta Force | NovaLogic |
| .PUB | Microsoft Corporation | Game Files | Microsoft Publisher Document | LibreOffice | The Document Foundation |
| .PUD | Blizzard Entertainment Inc. | Game Files | Blizzard Map | StarCraft | Blizzard Entertainment Inc. |
| .PUZ | Literate Software | Game Files | Across Lite Crossword Puzzle | Across Lite | Literate Software |
| .PVI | Canon Inc. | Game Files | Canon Picture Browser Cache Index | Unknown Software | Unknown Developer |
| .PWF | Valve | Game Files | Counter-Strike PODBot Waypoint File | Half-Life: Counter Strike | Valve |
| .PZL | Tibo Software | Game Files | Jigs@w Puzzle File | Jigs@w Puzzle | Tibo Software |
| .PZP | Application Techniques Inc. | Game Files | Pizazz Plus Palette Settings File | Pizazz | Application Techniques Inc. |
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