| psi | Affymetrix Probe Set Information |
| psin | PS-GVB Chemical Modeller Input Data |
| psivec | SUPPA diffSplice Output Data |
| psj | PLUS-Slitting Binary Job |
| psjob | Microsoft Photosynth Job Data |
| psl | MasterCook Layout Data |
| psl | MicroSim PCBoard Padstack Library |
| pslic | PureSync License Data |
| psml | PSML Page Definition |
| psmodel | Delcam PowerSHAPE Model |
| psn | OptionVue Portfolio Manager Positions Data |
| pso | DreamPlan Home Design Software Data |
| psod | Roxio Easy Media Creator Album Data |
| psout | PS-GVB Chemical Modeller Output Data |
| psp | OvenWATCH Paste File |
| pspbumpmap | Corel Paint Shop Pro Bumpmap |
| pspcache | Corel Paint Shop Pro Cache |
| psppalette | Corel Paint Shop Pro Palette |
| pspselection | Corel Paint Shop Pro Selection |
| pspshape | Corel Paint Shop Pro Shape Data |
| pspworkspace | Corel Paint Shop Pro Workspace |
| psr | Famous Report |
| psr | PowerSoft Report |
| pst | Concordance E-Mail Database |
| 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 |
| psw6 | Password Depot 6 Data File |
| psw8 | Password Depot Portable Data |
| pswx | Password Depot Portable Data |
