| | PA | | per |
| | PA | | per annum |
| | PA | | personal assistant |
| | PA | | pf |
| | PA | | prosecuting attorney |
| | PA | | public anouncement |
| | PABG | | Pack A Big Gun |
| | PABX | | Private Automatic Branch Exchange |
| | pacs | | packs |
| | pacs | | Picture Archival Computer Systems |
| | pacs | | Picture Archiving and Communication Systems |
| | PAN | | people alleged to be normal |
| | PAN | | Personal area networking |
| | pans | | Pretty Amazing New Stuff |
| | pans | | Pretty Awesome New Stuff |
| | PARC | | Palo Alto Research Center |
| | PARIS | | People Always Remember Iron Structure |
| | PAYE | | pay as you earn |
| | PAYG | | Pay As You Go |
| | PAYG | | pay-as-you-go |
| | PB&J | | Peanut butter and Jelly |
| | PB&J | | Peanutbutter and Jelly |
| | PBCAK | | Problem Between Chair And Keyboard |
| | PBD | | Programmer Brain Damage |
| | pbfu | | post birdie f**k up |
| | PBM | | Play By Mail |
| | PBNFL | | Possible, But Not f**king Likely |
| | PBS | | public broadcasting system |
| | PCB | | please call back |
| | PCB | | poly chlorinated biphenyl |
|