| ops | Microsoft Office Profile Settings |
| opt | MySQL Server Database Options Data |
| options | SE-DesktopApps Configuration |
| opts | Linux Configuration Options |
| ora | Oracle Configuration |
| osd | Directory Opus Configuration |
| osdx | Search Connector Description |
| otoconfig | OTOsuite Configuration Data |
| ovpn | OpenVPN Configuration |
| p2k | WinPCD T2 Configuration |
| p2x | PC-DMIS to Excel Settings Data |
| p3e | Adobe Photoshop Repousse Settings |
| p3l | Adobe Photoshop Light Preset |
| p3m | Adobe Photoshop Material Preset |
| p3r | Adobe Photoshop Render Settings Preset |
| p9d | Plane9 Configuration Data |
| pan | CorelDraw Printer Specific Settings Data |
| panl | CodeWarrior Preferences Panel Data |
| pbk | Remote Access Phonebook Data |
| pbv | Corel Paint Shop Pro Bevel Preset |
| pc2 | Autodesk AutoCAD Plot Configuration |
| pc2 | Autodesk AutoCAD Plotter 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 |
| pcy | True64 Unix Policy Settings Data |
| pdadj | Cyberlink PhotoDirector Preset File |
| pdf | ArcInfo Preferences Definition Data |
| 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 |
