| pdl | Symbian OS Printer Driver |
| pdm | DeskMate Program |
| pdm | Sybase PowerDesigner Physical Data Model |
| pdoc | SAM grabdp Data |
| pdom | Eclipse IDE PDOM Index |
| pdp | Business Plan Pro Plan Conponent |
| pdpcmd | Pdplayer Command |
| pdpcomp | Pdplayer Composition |
| pdr | Mail.dat Piece Detail File |
| pdrp | DNA Screening Crystals Data |
| pds | Cyberlink PowerDirector Script |
| pds | IncrediMail Internal 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 |
| 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 |
