| Abbreviation | Definition |
|---|---|
| PNS | Pacific News Service |
| PNS | Pakistan News Service |
| PNSP | Payment Network Service Provider |
| PO | Post Office |
| POB | Point Of Beginning |
| POC | Prisoner Of Conscience |
| POC | Profiles Of Canada |
| POC | Proof Of Correction |
| POD | Publish On Demand |
| PODS | Publication Ordering And Distribution System |
| POE | Paid, Owned, Earned |
| POEM | paid owned and earned media |
| POG | Puzzle Of God |
| POJ | Profession Of Journalists |
| POKEMON | POcKet MONsters |
| POMA | Professional Outdoor Media Association |
| POMR | problem oriented medial records |
| PopSci | Popular Science |
| POQ | Public Opinion Quarterly |
| POS | Purveyor Of Substance |