| Abbreviation | Definition |
|---|---|
| P | Pointer |
| P | |
| P1PWAO | Putting 1 piece with another |
| PA | Printable ASCII |
| PAAA | People's Assembly Against Austerity |
| PACE | Parliamentary Assembly of the Council of Europe |
| PADI | Patches Arrive During Instruction |
| PAE | Physical Address Extensions |
| PB | Protection Bit |
| PBD | Print and Break Drum |
| PC | Program Counter |
| PCA | Programmable Counter Array |
| PCAG | PEBBLE CREEK Assembly of God |
| PCAP | Parallel Contig Assembly Program |
| PCBA | Printed Circuit Board Assembly |
| PCL | Program Counter Low |
| PCMIA | Personal Computer Manufacturer Interface Adaptor |
| PCS | Portable Character Set |
| PD | Pen Down |
| PDC | Processor Dependent Code |