| pdef | Protean Data Exchange Format Data |
| pdes | PIPE-FLO Design Template |
| pdex | Orient Computer Encrypted Data |
| pdfpla | Esko Plato Layout Data |
| pdfsta | Esko Plato Station Data |
| pdfz | Adobe PDF JobReady Launcher Data |
| pdf_profile | Serif PagePlus PDF Profile |
| pdg | MetaCAM Part Data |
| pdg | Print Designer GOLD Data |
| pdg | PrintShop Deluxe PDG Data |
| pdic | Personal Dictionary Database |
| pdj | Pioneer CDJ-1000MK3 Index Data |
| pdl | DB-MAIN Text Pattern Data |
| pdl | Symbian OS Printer Driver |
| pdl | WITE32 Pattern Data |
| 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 |
| pdpd | Synthrone Crafter PDPD Data |
| pdr | Mail.dat Piece Detail File |
| pdrp | DNA Screening Crystals Data |
| pds | Cyberlink PowerDirector Script |
| pds | IncrediMail Internal Data |
| pdt | Autodesk Land Desktop Hydrology Data |
| pdt | GEUS Polar Data |
| pdt | ProCite Database |
