| Abbreviation | Definition |
|---|---|
| PSQIA | Patient Safety and Quality Improvement Act (HHS) |
| PSR | Problem Solving Report |
| PSRB | Professional Statutory Regulatory Body |
| PSRS | Pacific Southwest Research Station |
| PSS | Product Support Services |
| PSV | Public Service Vehicle |
| PSWMRL | Pasture Systems and Watershed Management Research Lab |
| PT | Physical Torture |
| PT | Presidio Trust |
| PTA | Preferential Treatment Accelerator |
| PTA | Prevention of Terrorism Act |
| PTAB | Patent Trial and Appeal Board |
| PTAC | Procurement Technical Assistance Center |
| PTB | Powers That Be |
| PTIN | Preparer Tax Identification Number |
| PTIS | Permit Tracking Issuance System |
| PTP | Payee TIN (Taxpayer Identification Number) Perfection file |
| PTP | Public Trust Position |
| PTPA | Peru Trade Promotion Agreement |
| PTPF | Payee TIN (Taxpayer Identification Number) Perfection File |