| .P07 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P08 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P10 | Open Source | Arquivos miscelâneas | Certificate Request File | OpenSSL | Open Source |
| .P11 | HERE | Arquivos miscelâneas | HERE Maps For Android Map Data Package | QuickPar | Open Source |
| .P13 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P14 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P15 | HERE | Arquivos miscelâneas | HERE Maps For Android Map Data Package | QuickPar | Open Source |
| .P17 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P18 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P19 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P2B | Open Source | Arquivos de dados | PeerGuardian 2 IP Blocking List | PeerGuardian 2 | Open Source |
| .P30 | Peter B. Clements | Arquivos de cópia | PAR Recovery Volume | QuickPar | Open Source |
| .P3T | Sony | Arquivos de jogos | PlayStation 3 Theme File | P3T Unpacker | Open Source |
| .P7 | Open Source | Arquivos Web | PKCS #7 Digital Certificate File | OpenSSL | Open Source |
| .PACKAGE | Electronic Arts | Arquivos de jogos | Electronic Arts Game Package File | Ambertation SimPE | Open Source |
| .PAF | FamilySearch | Arquivos de dados | Personal Ancestral File | PortableApps.com Platform | Open Source |
| .PAJ | Open Source | Arquivos de desenvolvedor | Pajek Project File | Pajek | Open Source |
| .PAK | Unknown Developer | Arquivos de jogos | Video Game Package | Dragon UnPACKer | Open Source |
| .PAM | Open Source | Arquivos de imagem Raster | Portable Arbitrary Map | Netpbm | Open Source |
| .PAQ6 | Open Source | Arquivos comprimidos | PAQ6 Data Archive | KGB Archiver | Open Source |
| .PAQ7 | Open Source | Arquivos comprimidos | PAQ7 Data Archive | PeaZip | Open Source |
| .PAQ8 | Open Source | Arquivos comprimidos | PAQ8 Data Archive | PAQ8 | Open Source |
| .PAQ8P | PAQ8P | Arquivos comprimidos | PAQ8L Data Archive | PAQ8 | Open Source |
| .PAR | Siemens PLM Software | Arquivos CAD | Solid Edge Part File | QuickPar | Open Source |
| .PAR2 | Open Source | Arquivos comprimidos | Parchive 2 Index File | QuickPar | Open Source |
| .PARAM | Open Source | Arquivos de dados | CASTEP Parameters Data | CASTEP | Open Source |
| .PART1 | NetObjects | Arquivos de dados | NetObjects Fusion System Data | PeaZip | Open Source |
| .PARTIMG | Unknown Developer | Arquivos de imagem de disco | Partimage File | Partition Image | Open Source |
| .PAS | Embarcadero Technologies | Arquivos de desenvolvedor | Delphi Unit Source File | Free Pascal | Open Source |
| .PB1 | Broderbund | Arquivos de dados | Broderbund 3D Home Architect Data | Backup Mill | Open Source |
| .PBM | Unknown Developer | Arquivos de imagem Raster | Portable Bitmap Image | AbiWord | Open Source |
| .PBN | Open Source | Arquivos de jogos | Portable Bridge Notation File | RoboBridge | Open Source |
| .PBS | Corel | Arquivos de configuração | PaintShop Pro Brush Strokes | PBS Professional | Open Source |
| .PCC | Electronic Arts | Arquivos de jogos | Mass Effect Package | UE Viewer | Open Source |
| .PCD | PokéCheats | Arquivos de jogos | Pokémon Wonder Card File | IrfanView | Open Source |
| .PCE | Open Source | Arquivos de jogos | TurboGrafx-16 ROM | Magic Engine | Open Source |
| .PCK | Microsoft Corporation | Arquivos de sistema | System Center Configuration Manager Package File | Dragon UnPACKer | Open Source |
| .PCL | Hewlett-Packard | Arquivos de layout de página | Printer Command Language Document | OpenPCL Viewer | Open Source |
| .PCM | Various Developers | Arquivos de áudio | Pulse Code Modulation | Audacity | Open Source |
| .PCS | Pfaff | Arquivos CAD | Pfaff Embroidery File | PesView | Open Source |
| .PDE | Open Source | Arquivos de desenvolvedor | Processing Development Environment Source | Processing | Open Source |
| .PDF | Adobe Systems Incorporated | Arquivos de layout de página | Portable Document Format File | PDFedit | Open Source |
| .PDK | Open Source | Arquivos de dados | PC Desktop Cleaner Configuration | PC Desktop Cleaner | Open Source |
| .PDL | PDL Developerment Team | Arquivos de desenvolvedor | Perl Data Language File | perldl | Open Source |
| .PDX | Adobe Systems Incorporated | Arquivos de dados | Adobe Acrobat Index File | Mayura Draw | Open Source |
| .PEA | Open Source | Arquivos comprimidos | PEA File Archive | PeaZip | Open Source |
| .PER | Microsoft Corporation | Arquivos de jogos | Age Of Empires Personality File | Notepad2 | Open Source |
| .PES | Brother International Corporation | Arquivos miscelâneas | Brother Embroidery Format | Embroidermodder 2 | Open Source |
| .PFA | Open Source | Arquivos de fonte | Printer Font ASCII File | FontForge | Open Source |
| .PFB | Adobe Systems Incorporated | Arquivos de fonte | Printer Font Binary File | FontForge | Open Source |
| .PFF | Access | Arquivos de layout de página | Formatta Portable Form File | Dragon UnPACKer | Open Source |
| .PGE | Open Source | Arquivos de jogos | PocketGrandmaster Engine File | PocketGrandmaster | Open Source |
| .PGM | Jef Poskanzer | Arquivos de imagem Raster | Portable Gray Map Image | IrfanView | Open Source |
| .PGN | Unknown Developer | Arquivos de jogos | Portable Game Notation File | Fritz | Open Source |
| .PGT | Open Source | Arquivos de jogos | Pokémon Gift File | Pokémon Mystery Gift Editor | Open Source |
| .PGZ | Open Source | Arquivos comprimidos | StreamLync Ownload Archives | ZipZag | Open Source |
| .PH4 | Open Source | Arquivos de desenvolvedor | PHP Script | PHP | Open Source |
| .PHC | David Harris | Arquivos Temporários | Pegasus Mail Header Cache | Embroidermodder 2 | Open Source |
| .PHE | Open Source | Arquivos de jogos | WinChess Game Record | WinChess | Open Source |
| .PHL | Amazon | Arquivos eBook | Kindle Popular Highlights File | AbiWord | Open Source |
| .PHP | Panic | Arquivos Web | PHP Source Code File | jEdit | Open Source |
| .PHP2 | Open Source | Arquivos Web | PHP 2 Web Page | gVim | Open Source |
| .PHP3 | Open Source | Arquivos Web | PHP 3 Web Page | gVim | Open Source |
| .PHP5 | Open Source | Arquivos Web | PHP 5 Web Page | AbiWord | Open Source |
| .PHS | Open Source | Arquivos de dados | XtalView Phase File | XtalView | Open Source |
| .PHZ | Algoryx Simulation | Arquivos de jogos | Algodoo Phun Compressed Phunlet | Phun | Open Source |
| .PID | Open Source | Arquivos miscelâneas | Process ID File | Linux | Open Source |
| .PIM | Avid Technology | Arquivos de complementos | Pro Tools Controller Plug-in Mappings File | PIM Archiver | Open Source |
| .PIX | PCI Geomatics | Arquivos GIS | PCI Geomatics Database File | GDAL | Open Source |
| .PIZ | Winrar | Arquivos comprimidos | Zipped File | PeaZip | Open Source |
| .PJ | Open Source | Arquivos de jogos | Project64 Saved State File | Project64 | Open Source |
| .PJP | Joint Photographic Experts Group | Arquivos de imagem Raster | JPEG Image | IrfanView | Open Source |
| .PK3 | id Software | Arquivos de jogos | Quake 3 Engine Game Data File | ZDoom | Open Source |
| .PKB | Oracle Corporation | Arquivos de desenvolvedor | Oracle Package Body File | Notepad2 | Open Source |
| .PKCS7 | Open Source | Arquivos Criptografados | Cryptographic Message Syntax Standard | OpenSSL | Open Source |
| .PKG | Apple | Arquivos comprimidos | Apple MacOS Installer Package | RPCS3 | Open Source |
| .PKM | Various Developers | Arquivos de jogos | Pokémon Saved Game Data File | Pokémon Mystery Gift Editor | Open Source |
| .PKO | Open Source | Arquivos de desenvolvedor | Packo Package | packø | Open Source |
| .PKS | Oracle Corporation | Arquivos de dados | Oracle Package Spec File | Notepad2 | Open Source |
| .PKX | IBM | Arquivos de dados | Rational XDE Data | PKHeX | Open Source |
| .PL | Larry Wall | Arquivos de desenvolvedor | Perl Source Code | BRL-CAD | Open Source |
| .PL1 | Broderbund | Arquivos Gráficos | 3D Home Architect Room Plan | PL/I for GCC | Open Source |
| .PLAYER | Re-Logic | Arquivos de jogos | Terraria Mobile Player File | Pokémon Type Wild | Open Source |
| .PLI | IBM | Arquivos de desenvolvedor | PL/I Source Code File | PL/I for GCC | Open Source |
| .PLIST | Apple | Arquivos de configuração | Property List XML File | HandBrake | Open Source |
| .PLK | Advanced Micro Devices, Inc. | Arquivos de sistema | AMD ATI Radeon Video Driver | Password Safe | Open Source |
| .PLOT | Open Source | Arquivos de imagem vector | Vector Graphics | Gnuplot | Open Source |
| .PLS | Various Developers | Arquivos de áudio | Audio Playlist | Clementine | Open Source |
| .PLT | Tecplot, Inc | Arquivos de dados | Tecplot Binary Data File | IrfanView | Open Source |
| .PLUGIN | Adobe Systems Incorporated | Arquivos de complementos | Adobe Photoshop Plugin | Amaya | Open Source |
| .PLY | MakeMusic, Inc. | Arquivos de áudio | Finale Playback File | MeshLab | Open Source |
| .PMB | Polar | Arquivos Gráficos | Polar Uplink Tool Bitmap File | PeaZip | Open Source |
| .PML | Microsoft Corporation | Arquivos de dados | Process Monitor Log File | Calibre | Open Source |
| .PNB | Open Source | Arquivos de jogos | Pokemon NetBattle Data | Pokemon NetBattle | Open Source |
| .PNT | Apple | Arquivos de imagem Raster | MacPaint File | Panther | Open Source |
| .PNV | Open Source | Arquivos de dados | CRiSP Harvest File | CRiSP Harvest | Open Source |
| .PO | Sublime HQ Pty Ltd | Arquivos de desenvolvedor | Portable Object | AppleWin | Open Source |
| .POD | Terminal Reality | Arquivos de jogos | Terminal Reality Game Data File | Dragon UnPACKer | Open Source |
| .POO | Open Source | Arquivos miscelâneas | Commodore C64 Machine Code | CCS64 | Open Source |
| .PP1 | Open Source | Arquivos miscelâneas | Free Pascal Compiled Unit | Free Pascal | Open Source |
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