| pdb | DL_POLY PDB Trajectory Data |
| pdb | Brookhaven Protein DataBase |
| pdb | CYANA PDB Coordinate File |
| pdcdm | Sybase PowerDesigner Conceptual Data Model |
| pde | AFP Page Definition |
| pde | Pathology Data Exchange File |
| pdg | Print Designer GOLD Data |
| pdic | Personal Dictionary Database |
| pdj | Pioneer CDJ-1000MK3 Index Data |
| pdm | Sybase PowerDesigner Physical Data Model |
| pdom | Eclipse IDE PDOM Index |
| pdpcmd | Pdplayer Command |
| pdpcomp | Pdplayer Composition |
| pdr | Mail.dat Piece Detail File |
| 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 |
| 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 |
| 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 |