| .oma |
Sony OpenMG Music File |
| .oga |
Ogg Vorbis Audio File |
| .ovw |
Logic Pro Overview File |
| .obw |
Superior Drummer Sounds File |
| .ofr |
OptimFROG Audio File |
| .opus |
Opus Audio File |
| .orc |
Voyetra Digital Orchestrator File |
| .prg |
PC-DMIS Part Program File |
| .psf |
Photoshop Proof Settings File |
| .pls |
PL/SQL Stored Procedure |
| .ptf |
Scrapbook Flair Template |
| .pac |
Proxy Auto-Config File |
| .pcast |
iTunes Podcast File |
| .ptx |
Pro Tools Session File |
| .ptxt |
Pro Tools Session Template |
| .pca |
Perfect Clarity Audio File |
| .pat |
Pattern file |
| .ply |
Finale Playback File |
| .ptm |
MapPoint Map File |
| .pts |
Pro Tools Session |
| .psm |
Solid Edge Sheet Metal File |
| .pla |
Sansa Playlist File |
| .pna |
PhatNoise Audio File |
| .pcg |
Korg Instrument Bank File |