| plb | PhotoLine Browser Index Data |
| plc | P-CAD Database |
| ple | Messenger Plus! Live Encrypted Log |
| plf | PatchLink Developers Kit Exported Patch |
| plg | BPM Studio Playlist Group |
| plg | Microsoft Developer Studio Build Log |
| plgx | KeePass v2 Plugin |
| plib | SAM Old Dirichlet Mixture Prior Library |
| plist | Mac OS X Property List Data |
| plj | Plus 2D Job Data |
| plk | COREX Part-of-speech Tag Data |
| plk | Password Safe Lock File |
| plma | Protomata-Learner PLMA Data |
| plmn | GSM Public Land Mobile Network Data |
| plmx | PDXpert PLM XML Data |
| plmxml | Siemens PLM XML Data |
| plo | Radio Toolbox Playlist |
| plot | Matplotlib Plot |
| plp | Messenger Plus! Live Sound Package |
| plq | TAK 2000 Heat Rate Plot |
| plr | Mail.dat Package Label File |
| pls | Spike2 Output Sequencer Views Data |
| plsc | Messenger Plus! Live Script |
| plsk | Messenger Plus! Live Skin Pack |
| plt | EPOC Software Platform Data |
| plt | MODTRAN Spectral Output File |
| plt | PTC Creo Plot Data |
| plt | Tecplot 360 Binary Plot Data |
| plt0 | Nintendo Wii Palette Data |
| pltn | Appearance Manager Platinum Theme Data |
