| pdsc | µVision Package Description |
| pdt | VersaPro PLC Compiled Block |
| per | PEX Report |
| per | ASN-1Step Packed Encoding Rules Data |
| perf | Linux Perf Data |
| perl | Perl Script |
| pfg | jEEPers DX Program Configuration |
| pgc | PostgreSQL ECPG C Source File |
| pgf | Grammatical Framework Compiled Grammar |
| pgh | PostgreSQL ECPG C Header File |
| pgsql | PostgreSQL Script |
| pgx | Visual Basic Binary Property Page File |
| phar | PHP Archive |
| phd | Portable Heap Dump |
| php | PHP Script |
| php2 | PHP Script |
| php3 | PHP Script |
| php4 | PHP Script |
| php5 | PHP Script |
| phps | PHP Script |
| pht | PHP Script |
| phtm | PHP Script |
| phtml | PHP Script |
| phy | Valve Source Collision Model Data |
| pi4 | Robolab Pilot 4 Program |
| pi5 | GEMPIE Print File |
| pickle | Python Pickle |
| pidx | CMSIS Pack Package Index |
| pih | Karrigell Python Inside HTML File |
| pir | Parrot Intermediate Representation File |
| pjm | Visual FoxPro Project Metafile |
| pjt | Visual FoxPro Project Memo |
| pkb | Oracle Package Body |
| pkh | Oracle Package Header |
| pko | Packo Package |