| Abbreviation | Definition |
|---|---|
| PSI | Present Serviceability Index |
| PSIA | Pounds per Square Inch, Absolute |
| PSL | passenger service license |
| PSL | Posted Speed Limit |
| PSLV | Polar Satellite Landing Vehicle |
| PSLV | Polar Space Launch Vehicle |
| PSLV | Polar Survey Landing Vehicle |
| PSMV | Possession of a Stolen Motor Vehicle |
| PSR | Present Serviceability Rating |
| PSS | Personal Safety System |
| PSS | Port Safety and Security |
| PSS | Port Security Surcharge |
| PSSC | Post-Settlement Subframe Condition (BMW) |
| PSU | Passenger Service Unit |
| PSU | Primary Sampling Unit |
| PSU | Primary Sampling Units |
| PSV | Passenger Service Vehicle |
| PSV | Personal Security Vehicle |
| PSV | Private Security Vehicle |
| PSV | Public Service Vehicles |