| onpreset | Perfect Effects Preset Data |
| opax | Microsoft Office User Settings File |
| opn | Opera Optimizer Settings |
| ops | Microsoft Office Profile Settings |
| ora | Oracle Configuration |
| osdx | Search Connector Description |
| ovpn | OpenVPN Configuration |
| p2k | WinPCD T2 Configuration |
| p3e | Adobe Photoshop Repousse Settings |
| p3l | Adobe Photoshop Light Preset |
| p3m | Adobe Photoshop Material Preset |
| p3r | Adobe Photoshop Render Settings Preset |
| panl | CodeWarrior Preferences Panel Data |
| pbk | Remote Access Phonebook Data |
| pbv | Corel Paint Shop Pro Bevel Preset |
| pc2 | Autodesk AutoCAD Plotter Configuration |
| pc2 | Autodesk AutoCAD Plot Configuration |
| pc3 | Autodesk AutoCAD Plot Configuration |
| pc3 | Autodesk AutoCAD Plotter Configuration |
| pcp | Autodesk AutoCAD Plotter Configuration |
| pctl | Kaspersky Internet Security Parental Control Settings |
| pcv | WindLDR Print Settings |
| pdadj | Cyberlink PhotoDirector Preset File |
| pdfs | Adobe Illustrator PDF Presets |
| pdk | PC Desktop Cleaner Configuration |
| pdlcp | Cyberlink PhotoDirector Lens Profile |
| perfmoncfg | Windows Performance Monitor Configuration |
| pf2 | Canon Picture Style Settings |
| pfk | XTree Programmable Function Keys Settings |
| pie | GlovePIE Controller Script |
| pio | Avid Pro Tools IO Settings |
| pip | Microsoft Office Personalized Menu |
| pjsua | PJSUA Configuration |
| pjunoxl | TAL-U-NO-LX Preset File |
| plh | Corel Paint Shop Pro Preset |