| properties | Java Properties File |
| props | Visual Studio Property Sheet |
| proto | Protocol Buffers Data |
| provxml | Microsoft Windows Provisioning XML Data |
| prq | InstallShield Prerequisites |
| ps1 | Windows PowerShell Script |
| ps1x | Windows PowerShell ASP Script |
| ps1xml | Windows PowerShell Types File |
| ps2xml | Windows PowerShell Types File |
| psc | PSCAD Power System Simulation Software Case |
| psc1 | Windows PowerShell Console Script |
| psc2 | Windows PowerShell Console Script |
| pscmd | PrimalScript Script |
| pscx | PSCAD XML Case Data |
| psd1 | Windows PowerShell Data |
| psess | Visual Studio Performance Session |
| psgi | Perl Web Server Gateway Interface Script |
| pshader | Visual Studio Shader Program Data |
| psl | PowerTerm Power Script |
| psl | PSCAD Power System Simulation Library |
| pslx | PSCAD XML Library |
| psm1 | Windows PowerShell Script Module |
| psmdcp | NuGet Metadata |
| pso | Microsoft DirectX D3D Compiled Pixel Shader |
| psql | PostgreSQL Script |
| psrc | Parasoft Insure++ Configuration |
| pssg | EGO Engine Texture |
| ptc | PFXplus Compiled Program |
| pth | Python Path Configuration |
| ptl | IBM Rational Rose Petal File |
| ptm | Portable Translation Memories |
| ptx | CUDA Parallel Thread Execution Assembly Data |
| pubxml | Visual Studio Publish Profile XML Data |
| pug | Pug Markup Language Document |
| puml | PlantUML Diagram |
