| pen | Corel Paint Shop Pro Pen Preset |
| pencast | Livescribe Desktop Data |
| pep2 | ProntoEdit Professional v2 Data |
| perm | PLINK Adaptive Permutation Test Report |
| perspective | Xcode Project Data |
| pes | Brother Embroidery Data |
| pest | PEST Data |
| pev | CompHEP Output File |
| pev | POSE Palm Event Data |
| pext | 4D Database for Mac External |
| pez | Prezi Desktop Presentation |
| pf | Microsoft Windows Prefetch Data |
| pfb | ParFlow Binary Data |
| pfc | Corel PercetFit Component |
| pfcolors | Pixelformer Colors Data |
| pfd | Optima! 2.5 Document |
| pfd | Alzex Personal Finance Data |
| pfe | Programmers File Editor Data |
| pfep | PronoFoot Expert Plus Data |
| pfg | Altair FEKO Optimisation Information Data |
| pfg | Epson PIF Designer Frame |
| pfh | MarkNet N2601e Flash Data |
| pflog | Peregrine ServiceCenter Database Update Log |
| pfs | Altair FEKO POSTFEKO Session Data |
| pfsb | ParFlow Scattered Binary Data |
| pfsol | ParFlow Solid Data |
| pfx | PKCS #12 Data File |
| pg | STK Great Arc Propagator File |
| pg | STK Propagator File |
| pg2 | ProGen 2 Protocol Data |
