| pdex | Orient Computer Encrypted Data |
| pdg | Print Designer GOLD Data |
| pdic | Personal Dictionary Database |
| pdj | Pioneer CDJ-1000MK3 Index Data |
| pdm | Sybase PowerDesigner Physical Data Model |
| pdoc | SAM grabdp Data |
| pdom | Eclipse IDE PDOM Index |
| pdpcmd | Pdplayer Command |
| pdpcomp | Pdplayer Composition |
| pdr | Mail.dat Piece Detail File |
| pdrp | DNA Screening Crystals Data |
| pdtex | PDF-XChange Editor Data |
| pdtt | STK Processed Terrain File |
| pdu | SMS Protocol Description Unit |
| pdv | Velocity Process Data |
| pdvr | QuickDraw GX Printer Driver |
| pdx | Product Data eXchange File |
| pdxl | PDXpert PLM License Data |
| pe | STK Planetary Ephemeris File |
| peak | Steinberg WaveLab Audio Peak |
| peaks | XEASY Peak List |
| pec | pCon.planner Exchange Container Data |
| ped | PLINK Pedigree and Genotype Table |
| pee | Sage Estimating Data |
| pek | Adobe Premiere Waveform Data |
| pel | IBM Forms Logger File |
| 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 |
| perm | PLINK Adaptive Permutation Test Report |
| perspective | Xcode Project Data |
| pes | Brother Embroidery Data |
| pest | PEST Data |