| 261. | .pvl | Library (Instalit) |
| 262. | .pvt | Local Fidonet pointlist (FTN software) |
| 263. | .pvu | Paleoenvironmental data (PaleoVu) |
| 264. | .pw | Text document (Professional Write) |
| 265. | .pwd | Text document (Microsoft Pocket Word) |
| 266. | .pwl | Password List |
| 267. | .pwp | Multi-image file (Seattle File Works) ◊ Text document (Professional WritePlus) |
| 268. | .pwz | Wizard (Microsoft Powerpoint) |
| 269. | .px | Primary database index (Paradox) |
| 270. | .pxl | Pixel data (TeX driver) ◊ Script (PiXCLscript) ◊ Spreadsheet (Microsoft Pocket Excel) |
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