| Extension | File Description |
| .PAS | Developer Files |
| .PASCAL | Uncommon Files |
| .PASM | Uncommon Files |
| .PASS | Uncommon Files |
| .PASSAGE | Uncommon Files |
| .PASSERS | Uncommon Files |
| .PAT | System Files |
| .PATCH | Uncommon Files |
| .PATCHDOCS | Uncommon Files |
| .PATCHER | Uncommon Files |
| .PATH | Uncommon Files |
| .PATHNAME | Uncommon Files |
| .PATHS | Uncommon Files |
| .PATTERN | Uncommon Files |
| .PAU | Uncommon Files |
| .PAUSE | Uncommon Files |
| .PAV | Uncommon Files |
| .PAV???? | Uncommon Files |
| .PAW | Data Files |
| .PAX | Compressed Files |
| .PAY | Uncommon Files |
| .PAYMENTS | Uncommon Files |
| .PAYROLL | Uncommon Files |
| .PAZ | Uncommon Files |
| .PB | Developer Files |
| .PB0 | Uncommon Files |
| .PB1 | Uncommon Files |
| .PB2 | Uncommon Files |
| .PB3 | Uncommon Files |
| .PB4 | Uncommon Files |
| .PB5 | Uncommon Files |
| .PB6 | Uncommon Files |
| .PB7 | Uncommon Files |
| .PB8 | Uncommon Files |
| .PB9 | Uncommon Files |
| .PBA | Plugin Files |
| .PBB | Backup Files |
| .PBC | Uncommon Files |
| .PBD | Backup Files |
| .PBE | Uncommon Files |
| .PBF | Backup Files |
| .PBG | Uncommon Files |
| .PBH | Uncommon Files |
| .PBI | Compressed Files |
| .PBJ | Uncommon Files |
| .PBK | Developer Files |
| .PBL | Uncommon Files |
| .pbm | Uncommon Files |
| .PBMP | Uncommon Files |
| .PBMV | Uncommon Files |
| .PBN | Game Files |
| .PBO | Uncommon Files |
| .PBOB | Uncommon Files |
| .PBP | Game Files |
| .PBPROJ | Developer Files |
| .PBQ | Uncommon Files |
| .PBR | Uncommon Files |
| .PBS | Uncommon Files |
| .PBT | Uncommon Files |
| .PBTPL | Uncommon Files |
| .PBU | Uncommon Files |
| .PBV | Uncommon Files |
| .PBW | Uncommon Files |
| .PBX | Uncommon Files |
| .PBY | Uncommon Files |
| .PBZ | Uncommon Files |
| .PC | Developer Files |
| .PC0 | Uncommon Files |
| .PC1 | Raster Image Files |
| .PC2 | Raster Image Files |
| .PC3 | Settings Files |
| .PC4 | Uncommon Files |
| .PC5 | Uncommon Files |
| .PC6 | Uncommon Files |
| .PC7 | Uncommon Files |
| Extension | File Description |
| .PC8 | Uncommon Files |
| .PC9 | Uncommon Files |
| .PC? | Raster Image Files |
| .PCA | Audio Files |
| .PCAP | Data Files |
| .PCB | Data Files |
| .PCBDOC | Uncommon Files |
| .PCC | Game Files |
| .PCD | Game Files |
| .PCDS | Uncommon Files |
| .PCE | Uncommon Files |
| .PCE-LIST | Uncommon Files |
| .PCF | Game Files |
| .PCG | Audio Files |
| .PCH | Developer Files |
| .PCH2 | Uncommon Files |
| .PCI | Uncommon Files |
| .PCI1 | Uncommon Files |
| .PCI3 | Uncommon Files |
| .PCJ | Uncommon Files |
| .PCK | Game Files |
| .PCL | Page Layout Files |
| .PCLF | Uncommon Files |
| .PCLXL | Data Files |
| .PCM | Audio Files |
| .PCN | Uncommon Files |
| .PCO | Uncommon Files |
| .PCP | Developer Files |
| .PCQ | Uncommon Files |
| .PCR | Data Files |
| .PCS | CAD Files |
| .PCT | Page Layout Files |
| .PCU | Uncommon Files |
| .PCURL | Text Files |
| .PCV | Compressed Files |
| .PCW | Uncommon Files |
| .PCX | Raster Image Files |
| .PCY | Uncommon Files |
| .PCZ | Uncommon Files |
| .PD | Vector Image Files |
| .PD0 | Uncommon Files |
| .PD1 | Uncommon Files |
| .PD2 | Uncommon Files |
| .PD3 | Uncommon Files |
| .PD4 | Data Files |
| .PD5 | Data Files |
| .PD6 | Uncommon Files |
| .PD7 | Uncommon Files |
| .PD8 | Uncommon Files |
| .PD9 | Uncommon Files |
| .PDA | Uncommon Files |
| .PDAS | Data Files |
| .PDATA | Uncommon Files |
| .PDB | Backup Files |
| .PDBX | Uncommon Files |
| .PDC | Encoded Files |
| .PDD | Data Files |
| .PDE | Developer Files |
| .PDES | Uncommon Files |
| Page Layout Files | |
| .PDFENX | Uncommon Files |
| .PDFIG | Data Files |
| .PDG | Page Layout Files |
| .PDH | Uncommon Files |
| .PDI | Disk Image Files |
| .PDJ | Uncommon Files |
| .PDK | Uncommon Files |
| .PDL | Developer Files |
| .PDM | Database Files |
| .PDN | Raster Image Files |
| .PDO | Data Files |
| .PDP | Page Layout Files |
| .PDQ | Uncommon Files |
| .PDR | Page Layout Files |
| .PDS | Data Files |
