| poco | Apple Guide POCO Data |
| pof | Altera Programmer Object File |
| poi | General POI Database |
| poi | BrainVoyager QX Patches-of-interest Data |
| pok | Spectrum Games Database POKE Data |
| pol | InnovMetric Polyworks Modeler 3D Model |
| poly | RMCProfile Polyhedral Restraints Data |
| polys | Ribbons Polygon Definition |
| pont | Protege Classes Data |
| pool | TeX Pool Data |
| por | SPSS Statistics Portable |
| pos | STK Position File |
| pos | BrainVoyager QX Slice Positioning Data |
| post | Light Post |
| postal | TomTom Postal Code Database |
| postinst | Debian Package Post-installation Script |
| postrm | Debian Package Post-removal Script |
| pot | CASIA-OLHWDB 1.0 Page Data |
| potmenx | Egis Encrypted Powerpoint POTM Template |
| pov-state | POV-Ray State File |
| pow | WAsP Power Curve |
| poz | Poser 1.0 Scene |
| pp2 | Poser Props Data |
| pp3 | RawTherapee Sidecar File |
| ppass | ParaPass Keystore |
| ppd | Polar ProTrainer Person Data |
| ppd | ProfiCAD Symbol Data |
| ppf | PPF-O-Matic Patch |
| pphe | PLINK Phenotype Permutations Data |
| ppi | Lifo-Pro Producer Price Index |
