| Abbreviation | Definition |
|---|---|
| PAR | Pension Adjustment Reversal |
| PAR | Personnel Action Required |
| PAR | Personnel Activity Reporting |
| PAR | Problem Approach Resolution |
| PAS | Publicly Available Specification |
| PASGT | Personnel Armor System for Ground Troops |
| PASS | Performer Availability Screening Services |
| PASS | Post Approval Surveillance System |
| PASS | Procurement Automated Source System |
| PASS | Proof of Age Standards Scheme |
| PAST | Principles Assumptions Steps And Techniques |
| PAT | Property Acquisition Team |
| Pat.Off. | [U.S.] Patent Office |
| PATRIOT | Provide Appropriate Tools Required To Intercept And Obstruct Terrorism |
| PATRIOT | Providing Appropriate Tools Required To Intercept And Obstruct Terrorism |
| PAV | Pulse Air Valve |
| PAWB | United States Bankruptcy Court for the Western District of Pennsylvania |
| PAWS | Phased-Array Warning System |
| PB | Project Bucharest |
| PBA | Participatory Budget Analysis |