| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .PAF | FamilySearch | Executable Files | Personal Ancestral File | Personal Ancestral File | FamilySearch |
| .PE | Microsoft Corporation | Executable Files | Portable Executable File | Microsoft Windows | Microsoft Corporation |
| .PEX | Schlumberger Limited | Executable Files | Merak Peep Data File | Merak Peep | Schlumberger Limited |
| .PIF | Microsoft Corporation | Executable Files | Program Information File | Microsoft Windows | Microsoft Corporation |
| .PKGLIST | Pepper Computer | Executable Files | Pepper Keeper Package Installation File | Pepper Keeper | Pepper Computer |
| .PLSC | Microsoft Corporation | Executable Files | Messenger Plus! Live Script File | Microsoft Windows Live Messenger | Microsoft Corporation |
| .PLX | ActiveState | Executable Files | Perl Executable File | BBEdit | Bare Bones Software |
| .PRC | Adobe Systems Incorporated | Executable Files | Product Representation Compact File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PRG | Open Source | Executable Files | Program File | Notepad++ | Don Ho |
| .PRX | Microsoft Corporation | Executable Files | FoxPro Compiled Program | Microsoft Visual FoxPro | Microsoft Corporation |
| .PVA | Hauppauge Computer Works | Executable Files | Hauppauge DVB-Software File | Hauppauge DVB-Software | Hauppauge Computer Works |
| .PVD | Varden Development | Executable Files | Polygen3D Vector Descriptor | Polygen3D | Varden Development |
| .PWC | LANovation | Executable Files | PictureTaker File | LANovation PictureTaker | LANovation |
| .PYC | Python Software Foundation | Executable Files | Python Compiled File | Python | Python Software Foundation |
| .PYO | Python Software Foundation | Executable Files | Python Optimized Code | Python | Python Software Foundation |
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