| PRW | | people are watching |
| PSA | | Public Service Announcement |
| PSA | | Public Show Of Affection |
| PSB | | Pretty Stupid Boy |
| PSEO | | Post Secondary Enrollment Options |
| PSF | | per square foot |
| PSF | | polystyrene foam |
| PSF | | pounds per square foot |
| PSG | | Pretty Stupid Girl |
| PSI | | pounds per square inch |
| PSITA | | Persons skilled in the art |
| psml | | portal structure markup language |
| psmsl | | Permanent Service for Mean Sea Level |
| PSNB | | Public Sector Net Borrowing |
| psnfss | | post script new font selecting system |
| PSO | | Product Superior to Operator |
| PSP | | people service profit |
| PSP | | Play station Portable |
| PSP | | PlayStation Portable |
| PST | | Pacific Standard Time |
| PST | | Provincial Sales Tax |
| PSTN | | Public Switched Telephone Network |
| PSU | | Power Supply Unit |
| pt | | Part Time |
| pt | | Personal transportation |
| pt | | Physical Training |
| pt | | point |
| PTA | | parent teacher association |
| ptb | | Powers That Be |
| PTBNL | | Player to Be Named Later |
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