| pdt | Autodesk Land Desktop Hydrology Data |
| pdt | GEUS Polar Data |
| pdt | ProCite Database |
| pdtex | PDF-XChange Editor Data |
| pdtt | STK Processed Terrain File |
| pdu | SMS Protocol Description Unit |
| pdv | Velocity Process Data |
| pdvr | QuickDraw GX Printer Driver |
| pdw | pDRAW32 DNA Data |
| pdx | Corel Paradox PDX Data |
| pdx | ProCite Database Index |
| pdx | Product Data eXchange File |
| pdxl | PDXpert PLM License Data |
| pdz | GZipped Brookhaven Protein DataBase |
| pe | STK Planetary Ephemeris File |
| peak | Adobe Soundbooth Audio Peak Data |
| peak | Steinberg WaveLab Audio Peak |
| peaks | XEASY Peak List |
| peb | Corel WordPerfect PE Bottom Overflow |
| pec | pCon.planner Exchange Container Data |
| ped | Corel WordPerfect PE Deleted Data |
| 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 |
