| p | MATLAB Compiled Program |
| p1 | HI-TECH C Compiler Precompiled |
| p4a | Python for Android Script |
| p5 | Perl v5 Script |
| pag | Visual Basic Property Page File |
| page | HybridJava Web Page |
| par | FactoryTalk View Studio Parameter Component File |
| pas | Pascal/Delphi Source Code |
| pas | FreePascal Source Code |
| pasm | Parrot Assembly Source |
| pawn | Pawn Source Code |
| pb | PureBasic Source Code |
| pb1 | OrindaBuild Configuration |
| pb2 | OrindaBuild Configuration |
| pb3 | OrindaBuild Configuration |
| pbc | Parrot Compiled Bytecode |
| pbd | Sybase PowerBuilder Runtime Library |
| pbe | Proton Basic Compiler Errors File |
| pbg | Adobe Pixel Bender Graph |
| pbh | PowerBASIC DOS Help File |
| pbi | Microsoft Profiler Binary Input |
| pbj | Adobe Pixel Bender Bytecode |
| pbk | Adobe Pixel Bender Kernel |
| pbl | PowerBASIC DOS Static Library |
| pbl | Sybase PowerBuilder Source Code Library |
| pblib | PowerBASIC Library |
| pbo | Microsoft Profiler Binary Output |
| pbp | Proton Basic Compiler Library |
| pbr | Sybase PowerBuilder Resource Library |
| pbt | Microsoft Profiler Binary Table |
| pbtx | SAP PowerBuilder Target FIle |
| pbu | PowerBASIC DOS Compiled Unit |
| pbx | Sybase PowerBuilder Extension |
| pbxbtree | Xcode Auto-Complete Database |
| pbxuser | Xcode Project User Data |