| pst | Lahey Fortran Paste Buffer Data |
| pst | Lightwave 3D Preset |
| pst | Mastercam Post Processor Data |
| pst | Medbasin Parameters Data |
| pst | Microsoft Outlook Personal Folder File |
| pst | STAR-CD v3 Results Data |
| pstpl | LimeSurvey Template Data |
| pstt | STAR-CD v3 Transient Results Data |
| psv | PIPE-FLO Viewer Data |
| psv | Sony PlayStation 2 Saved Data |
| psw | Corel Paint Shop Pro Straw Wall Preset |
| psw | PrintShop Deluxe Data |
| psw6 | Password Depot 6 Data File |
| psw8 | Password Depot Portable Data |
| pswx | Password Depot Portable Data |
| psx | Dirty Little Helper PSX Data |
| psyexp | PsychoPy Experiment Data |
| pt | PassMark Performance Test Data |
| pt1 | WavePad Data |
| pt2 | Green Kenue Point Set Data |
| pt3 | Harvard Graphics 3.0 Device Driver |
| pt3d | POSS Points 3D Data |
| pt4 | Avid Pro Tools 4 Session Data |
| pt5 | Avid Pro Tools 5 Session Data |
| pt6 | Avid Pro Tools 6 Session Data |
| pt7 | Avid Pro Tools 7 Session Data |
| pt7 | Stitch R-XP Design |
| pt8 | Avid Pro Tools 8 Session Data |
| pt9 | PADS Layout Library Part Type Data |
| ptb | Peachtree Accounting Database Backup |
