| pcl | OptionVue Portfolio Manager Parcel Data |
| pcmi | ABB PCM600 Pre-configured IED Data |
| pcmt | ABB PCM600 Template IED Data |
| pcn | Corel Paint Shop Pro Contour Preset |
| pcp | SWAT Precipitation Input Data |
| pcr | Altair FEKO Exported ILU Preconditioner Data |
| pcrd | Bio-Rad CFX Manager Software Data |
| pcs | Microsoft Office ClipArt Data |
| pcs | CYANA Pseudocontact Shift Restraint File |
| pcsc | Android Exported Contacts Data |
| pcxml | Alteryx Designer Composer Data |
| pd | Paradox Database |
| pd1 | DFSee Partition Data |
| pd2 | DFSee Partition Data |
| pd4 | Windows Live Photo Gallery Information |
| pd5 | Windows Live Photo Gallery Information |
| pd6 | Lacerte Tax Data |
| pd9 | PADS Layout Library PCB Decal Data |
| pdas | PDAStore Data Store |
| pdata | JSim Pretty Data Format |
| pdb | Protein Data Bank |
| pdb | CYANA PDB Coordinate File |
| pdb | Brookhaven Protein DataBase |
| pdb | Ribbons Protein Databank |
| pdb | Sybase PowerDesigner Physical Data Model Backup |
| pdb | DL_POLY PDB Trajectory Data |
| pdbx | SunGard Martini Personal Database |
| pdcdm | Sybase PowerDesigner Conceptual Data Model |
| pde | Pathology Data Exchange File |
| pde | FlexPDE Script |