| .P | Python Software Foundation | Arquivos de dados | Python Pickle File | Python pickle | Python Software Foundation |
| .P0 | Würth Online World GmbH | Arquivos de dados | WOW! Data | WOW! | Würth Online World GmbH |
| .P06 | Bentley Systems | Arquivos de dados | MicroStation Modification Project Resource File | MicroStation | Bentley Systems |
| .P07 | Peter B. Clements | Arquivos de dados | PAR Recovery Volume | QuickPar | Open Source |
| .P1D | The Danfoss Group | Arquivos de dados | PLUS+1 Data | Plus+1 | The Danfoss Group |
| .P2B | Open Source | Arquivos de dados | PeerGuardian 2 IP Blocking List | PeerGuardian 2 | Open Source |
| .P2C | IBM | Arquivos de dados | IBM Voice Type Languages Newuser File | IBM Voice Type | IBM |
| .P3 | Oracle Corporation | Arquivos de dados | Primavera P3 Project File | Primavera | Oracle Corporation |
| .P38 | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .P3E | Adobe Systems Incorporated | Arquivos de dados | Photoshop Repousse Settings File | Adobe Photoshop CC | Adobe Systems Incorporated |
| .P3I | Tech4Learning | Arquivos de dados | Pixie File | Pixia | Isao Maruoka |
| .P3L | Adobe Systems Incorporated | Arquivos de dados | Adobe Photoshop Light Preset File | Adobe Photoshop | Adobe Systems Incorporated |
| .P5P | Oracle Corporation | Arquivos de dados | Oracle Solaris Image Packaging System | Solaris | Oracle Corporation |
| .P7X | Microsoft Corporation | Arquivos de dados | Packed Digital Signature File | Microsoft Visual Studio | Microsoft Corporation |
| .P83 | GAEB | Arquivos de dados | GAEB DA 2000 Data | GAEB data exchange XML | GAEB |
| .PA2 | Dr. Hsin H. Huang | Arquivos de dados | STABCAL Data File | STABCAL | Dr. Hsin H. Huang |
| .PAB | Microsoft Corporation | Arquivos de dados | Personal Address Book | Microsoft Outlook Express | Microsoft Corporation |
| .PACK | neOceane | Arquivos de dados | CustoPack Tools Theme Pack | CustoPack Tools | neOceane |
| .PAD | Swiftpage, Inc. | Arquivos de dados | ACT! Database Pointer File | Act! | Swiftpage, Inc. |
| .PAF | FamilySearch | Arquivos de dados | Personal Ancestral File | Personal Ancestral File | FamilySearch |
| .PAG | Microsoft Corporation | Arquivos de dados | Visual Basic Property PAGe File | Microsoft Visual Basic | Microsoft Corporation |
| .PAI | Magix Software GmbH | Arquivos de dados | MAGIX Photo Clinic File | Photo Clinic | Magix Software GmbH |
| .PAM | Open Source | Arquivos de dados | Portable Arbitrary Map | Adobe Photoshop | Adobe Systems Incorporated |
| .PAR | Siemens PLM Software | Arquivos de dados | Solid Edge Part File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PARAM | Open Source | Arquivos de dados | CASTEP Parameters Data | CASTEP | Open Source |
| .PARSER | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PART1 | NetObjects | Arquivos de dados | NetObjects Fusion System Data | NetObjects Fusion | NetObjects |
| .PART2 | NetObjects | Arquivos de dados | NetObjects Fusion System Data | NetObjects Fusion | NetObjects |
| .PASCAL | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PASS | Apple | Arquivos de dados | Xcode Wallet Data | Apple Xcode | Apple |
| .PAT | Autodesk, Inc. | Arquivos de dados | AutoCAD Hatch Pattern File | Autodesk AutoCAD | Autodesk, Inc. |
| .PATCHER | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PATH | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PAUSE | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PAV | Peavey Commercial Audio | Arquivos de dados | MediaMatrix Peavey Architectural View Data | MediaMatrix | Peavey Commercial Audio |
| .PAW | SecurelyShare | Arquivos de dados | PawaaFILE File Format | SecurelyShare | SecurelyShare |
| .PAY | Priority Data Sytems | Arquivos de dados | PriorityRate File | PriorityRate | Priority Data Sytems |
| .PAYROLL | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PB | Fantaisie Software | Arquivos de dados | PureBasic Source File | PureBasic | Fantaisie Software |
| .PB1 | Broderbund | Arquivos de dados | Broderbund 3D Home Architect Data | 3D Home Architect | Broderbund |
| .PBD | EaseUS | Arquivos de dados | EaseUS Todo Backup Backup File | EaseUS Todo Backup | EaseUS |
| .PBE | Crownhill Associates Limited | Arquivos de dados | Proton Plus Compiler Data | Proton Plus Compiler | Crownhill Associates Limited |
| .PBK | Microsoft Corporation | Arquivos de dados | Dial-Up Phone Book File | Microsoft Windows | Microsoft Corporation |
| .PBR | Sybase, Inc | Arquivos de dados | PowerBuilder Resource File | PowerBuilder | SAP |
| .PBU | PowerBASIC, Inc. | Arquivos de dados | PowerBASIC DOS Compiled Unit | PowerBASIC | PowerBASIC, Inc. |
| .PC | Personal Composer | Arquivos de dados | Personal Composer File | Personal Composer | Personal Composer |
| .PC5 | Rockwell Automation Inc. | Arquivos de dados | RSLogix 5 Internal Data | RSLogix 5 | Rockwell Automation Inc. |
| .PCAP | The Wireshark Team | Arquivos de dados | Packet Capture Data | Wireshark | The Wireshark Team |
| .PCB | Autodesk, Inc. | Arquivos de dados | Printed Circuit Board Design File | CadSoft EAGLE | Autodesk, Inc. |
| .PCBDOC | Altium | Arquivos de dados | Printed Circuit Board Description | Altium Designer | Altium |
| .PCC | Electronic Arts | Arquivos de dados | Mass Effect Package | Mass Effect 3 | BioWare |
| .PCD | PokéCheats | Arquivos de dados | Pokémon Wonder Card File | Pokesav | PokéCheats |
| .PCE | Open Source | Arquivos de dados | TurboGrafx-16 ROM | Magic Engine | Open Source |
| .PCH | MSC Software | Arquivos de dados | Nastran Punch Output File | MSC Nastran | MSC Software |
| .PCK | Microsoft Corporation | Arquivos de dados | System Center Configuration Manager Package File | Microsoft system center configuration manager | Microsoft Corporation |
| .PCP | Microsoft Corporation | Arquivos de dados | Windows Installer Patch Creation Properties File | Microsoft Windows SDK | Microsoft Corporation |
| .PCR | Futuremark Corporation | Arquivos de dados | PCMark Vantage Benchmark File | PCMark | Futuremark Corporation |
| .PCT | Apple | Arquivos de dados | Macintosh PICT Format | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PD | SAI | Arquivos de dados | FlexiSIGN 5 Plotter Document | FlexiSIGN | SAI |
| .PD3 | Autodesk, Inc. | Arquivos de dados | 3D Studio Max Data | Autodesk 3ds Max | Autodesk, Inc. |
| .PD4 | Jan van Wijk | Arquivos de dados | DFSee Partition Table And Boot Sector Backup | DFSee | Jan van Wijk |
| .PD5 | Microsoft Corporation | Arquivos de dados | Windows Live Photo Gallery Information File | Windows Photo Gallery | Microsoft Corporation |
| .PDA | Molecular Devices | Arquivos de dados | SoftMax Pro Microplate Data Analysis File | SoftMax Pro | Molecular Devices |
| .PDAS | hfrmobile | Arquivos de dados | PDAStore Data Store File | PDAStore | hfrmobile |
| .PDATA | Physiome Project | Arquivos de dados | JSim Pretty Data Format | JSim | Physiome Project |
| .PDB | Various Developers | Arquivos de dados | Program Database | Microsoft Visual Studio | Microsoft Corporation |
| .PDD | Adobe Systems Incorporated | Arquivos de dados | Adobe PhotoDeluxe Image | Adobe Illustrator CC | Adobe Systems Incorporated |
| .PDFIG | PDF Colony Software | Arquivos de dados | PDF Index Generator Project File | PDF Index Generator | PDF Colony Software |
| .PDK | Open Source | Arquivos de dados | PC Desktop Cleaner Configuration | PC Desktop Cleaner | Open Source |
| .PDO | Tama Soft | Arquivos de dados | Pepakura Designer File | Pepakura Designer | Tama Soft |
| .PDRPROJ | CyberLink | Arquivos de dados | PowerDirector Mobile Project | Cyberlink PowerDirector Mobile | CyberLink |
| .PDS | CyberLink | Arquivos de dados | PowerDirector Script File | PowerDirector | CyberLink |
| .PDT | Microsoft Corporation | Arquivos de dados | InkWriter Note Taker Template File | Windows Mobile | Microsoft Corporation |
| .PDW | AcaClone | Arquivos de dados | pDRAW32 DNA File | pDRAW32 DNA analysis | AcaClone |
| .PDX | Adobe Systems Incorporated | Arquivos de dados | Adobe Acrobat Index File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PDXL | Active Sensing, Inc. | Arquivos de dados | PDXpert PLM Data File | PDXpert PLM Software | Active Sensing, Inc. |
| .PE | Microsoft Corporation | Arquivos de dados | Portable Executable File | Microsoft Windows | Microsoft Corporation |
| .PEAK | Adobe Systems Incorporated | Arquivos de dados | Adobe Soundbooth Peak Data | Adobe Soundbooth | Adobe Systems Incorporated |
| .PEC | Brother International Corporation | Arquivos de dados | Brother Embroidery File | BALARAD Embird Studio | Embird Embroidery Software Suite |
| .PED | Corel | Arquivos de dados | Corel WordPerfect Deleted Item Data | Corel WordPerfect | Corel |
| .PEH | YesGoal LLC | Arquivos de dados | Power Email Harvester File | Power Email Harvester | YesGoal LLC |
| .PEPSI | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PES | Brother International Corporation | Arquivos de dados | Brother Embroidery Format | Embroidermodder 2 | Open Source |
| .PET | Larry Short, Mick Amadio and Puppy community | Arquivos de dados | Puppy Linux Install Package | 7-Zip | Igor Pavlov |
| .PEW | IAR Systems | Arquivos de dados | IAR Embedded Workbench Data File | IAR Embedded Workbench | IAR Systems |
| .PEX | Schlumberger Limited | Arquivos de dados | Merak Peep Data File | Merak Peep | Schlumberger Limited |
| .PEZ | Prezi | Arquivos de dados | Prezi Desktop Presentation | Prezi Desktop | Prezi |
| .PF | Smith Micro Software | Arquivos de dados | Private File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PFC | AOL | Arquivos de dados | AOL Personal File Cabinet | AOL | AOL |
| .PFG | jEEPersDX | Arquivos de dados | jEEPers Program Configuration File | jEEPers | Unknown Developer |
| .PFL | PlotSoft | Arquivos de dados | PDFill Project File | PlotSoft PDFill | PlotSoft |
| .PFW | Symantec Corporation | Arquivos de dados | Symantec LiveAdvisor Data | LiveAdvisor | Symantec Corporation |
| .PG | Unknown Developer | Arquivos de dados | PrintFox / PageFox Image File | XnView MP | XnSoft |
| .PG2 | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PG3 | Apple | Arquivos de dados | Golden Orchard Apple II CD Rom File | Apple OS X | Apple |
| .PGA | Just Great Software | Arquivos de dados | PowerGREP Action File | PowerGREP | Just Great Software |
| .PGDATA | Penguin George | Arquivos de dados | Penguin George Data File | Penguin George URL Melter | Penguin George |
| .PGL | Hewlett-Packard | Arquivos de dados | HP Plotter Language File Format | Unknown Software | Unknown Developer |
| .PGS | Grasshopper LLC | Arquivos de dados | PageStream Document | PageStream | Grasshopper LLC |
| .PGU | Microsoft Corporation | Arquivos de dados | PowerGREP File | PowerGREP | Just Great Software |
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