| Abbreviation | Definition |
|---|---|
| PRONI | Public Record Office of Northern Ireland |
| PROOF | Public Record Of Operations and Finance |
| PROP65 | PROPosition 65 |
| PRTPO | Peninsula Regional Transportation Planning Organization |
| PRW | Peoples Republic of Washington |
| PS | Peach State |
| PSA | Protective Services for Adults |
| PSAP | Public Safety Answering Point |
| PSAT | Puget Sound Action Team |
| PSBB | Pembatasan Sosial Berskala Besar (In Indonesian) |
| PSBR | Public Sector Borrowing Requirements |
| PSHA | Probabilistic Seismic Hazard Assessment |
| PSIA | Poverty and Social Impact Analysis |
| PSIP | Periodic Smoke Inspection Program |
| PSN | Provider Service Network |
| PSP | Power System Planning |
| PSRC | Puget Sound Regional Council |
| PTAB | Property Tax Appeal Board |
| PTCM | Parks Trails Council of Minnesota |
| PTD | Property Tax Division |