| .P1C | IBM | Arquivos miscelâneas | IBM Voice Type Language Newuser File | IBM Embedded ViaVoice | IBM |
| .P1I | IBM | Arquivos miscelâneas | IBM Voice Type Language Newuser File | IBM Embedded ViaVoice | IBM |
| .P2C | IBM | Arquivos de dados | IBM Voice Type Languages Newuser File | IBM Voice Type | IBM |
| .PCJ | IBM | Arquivos Gráficos | IBM LinkWay Graphics Data | IBM LinkWay | IBM |
| .PFL | PlotSoft | Arquivos de layout de página | PDFill Project File | Lotus 1-2-3 | IBM |
| .PHD | CyberLink | Arquivos de dados | PhotoDirector Project File | HeapRoots | IBM |
| .PKX | IBM | Arquivos de dados | Rational XDE Data | Rational Rose | IBM |
| .PLI | IBM | Arquivos de desenvolvedor | PL/I Source Code File | PL/I for VSE/ESA | IBM |
| .PLZ | IBM | Arquivos Gráficos | Lotus Freelance Presentation | Lotus Freelance Graphics | IBM |
| .POR | IBM | Arquivos de dados | SPSS Portable File | IBM SPSS | IBM |
| .POS | Trimble Inc. | Arquivos de dados | Trimble Position File | IBM Lotus Notes | IBM |
| .POTX | Microsoft Corporation | Arquivos de dados | PowerPoint Open XML Presentation Template | IBM Lotus Symphony | IBM |
| .PPR | IBM | Arquivos de dados | Cognos PowerPlay Report File | Cognos PowerPlay | IBM |
| .PPT | Microsoft Corporation | Arquivos de dados | PowerPoint Presentation | IBM Lotus SmartSuit | IBM |
| .PPX | Serif | Arquivos de layout de página | Serif PagePlus Template File | Cognos PowerPlay | IBM |
| .PRC | Adobe Systems Incorporated | Arquivos 3D | Product Representation Compact File | Rational Rose | IBM |
| .PRF | Microsoft Corporation | Arquivos de configuração | Outlook Profile File | FileNet eForms | IBM |
| .PRN | Various Developers | Arquivos de layout de página | HP PCL Printer Output | Lotus 1-2-3 | IBM |
| .PRP | IBM | Arquivos de dados | Rational Model Properties File | IBM Rational Rose development software | IBM |
| .PRU | IBM | Arquivos de dados | IBM Tivoli Storage Manager Pruned Entry Data | Tivoli Storage Manager | IBM |
| .PRZ | IBM | Arquivos de dados | Freelance Graphics Presentation File | Freelance Mobile Screen Show Player | IBM |
| .PSG | IBM | Arquivos de layout de página | Page Segment File | AFP Workbench Viewer | IBM |
| .PTL | IBM | Arquivos de desenvolvedor | Rational Rose Petal File | IBM Rational Rose development software | IBM |
| .PTY | IBM | Arquivos de desenvolvedor | Rational Property Set | Rational Rose | IBM |
| .PYI | IBM | Arquivos de dados | IBM Cognos 7 File | IBM Cognos Business Intelligence | IBM |
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