| ped | PLINK Pedigree and Genotype Table |
| pee | Sage Estimating Data |
| pek | Adobe Premiere Waveform Data |
| pel | IBM Forms Logger File |
| pem | Corel WordPerfect Program Editor Macro |
| pen | Corel Paint Shop Pro Pen Preset |
| pencast | Livescribe Desktop Data |
| pending | SendSafe Pending E-message Data |
| pep2 | ProntoEdit Professional v2 Data |
| peq | WordPerfect Program Editor Print Queue Data |
| per | Corel WordPerfect Program Editor Resident Area |
| perm | PLINK Adaptive Permutation Test Report |
| perspective | Xcode Project Data |
| pes | Brother Embroidery Data |
| pes | Corel WordPerfect Program Editor Workspace Data |
| pest | PEST Data |
| pet | Corel WordPerfect PE Top Overflow |
| pet | ISOBuster Custom CD Menu Data |
| pet | SWAT Potential Evapotranspiration Input 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 | DESQview PFB Data |
| pfb | ParFlow Binary Data |
| pfc | Corel PercetFit Component |
| pfc | Pegasus Mail Messages Cache |
| pfco | Pipe Flow Expert Component Data |
| pfcolors | Pixelformer Colors Data |
| pfd | Alzex Personal Finance Data |
| pfd | Optima! 2.5 Document |
| pfe | Programmers File Editor Data |
| pfep | PronoFoot Expert Plus Data |
| pff | Adobe Photoshop Zoomify Image Stream |
