| psc2 | Windows PowerShell Console Script |
| psd1 | Windows PowerShell Data |
| psess | Visual Studio Performance Session |
| psl | PowerTerm Power Script |
| 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 |
| pth | Python Path Configuration |
| ptl | IBM Rational Rose Petal File |
| ptm | Portable Translation Memories |
| pug | Pug Markup Language Document |
| puml | PlantUML Diagram |
| pvti | ParaView VTK Parallel Image Data |
| pvtp | ParaView VTK Parallel Poly Data |
| pvtr | ParaView VTK Parallel Rectilinear Grid |
| pvts | ParaView VTK Parallel Structured Grid |
| pvtu | ParaView VTK Parallel Unstructured Grid |
| pwn | Pawn Source Code |
| pxd | Pyrex Definition File |
| pxi | Pyrex Include File |
| pxx | Keyman Developer Encrypted Customisation File |
| py | Python Script |
| py2 | Python Script |
| py3 | Python Script |
| pyf | F2PY Signature File |
| pym | Python Macro File |
| pyn | Pynguin Project |
| pynb | IPython Notebook Document |
| pyo | Python Optimized Code |
| pyr | Python Repository |
| pyt | Python Declarations Data |
| pyw | Python Script |