| Abbreviation | Definition |
|---|---|
| PAA | Population Association Of America |
| PAA | The Proffessional Anglers Association |
| PAC | Professional Activity Committee |
| PACE | Partnership for Achieving Construction Excellence |
| PACE | Physicians' Academy for Cardiovascular Education |
| PACE | Professional Acivities Committees for Engineers |
| PACI | Professional Association of Climbing Instructors |
| PACT | Professional Association For Computer Training |
| PACU | Pennsylvania Association Of Colleges And Universities |
| PACU | Philippine Association of Colleges and Universities |
| PADI | Professional Association of Diving Instructors |
| PAFE | Portuguese Association of Financial Executives |
| PAG | Pima Association of Governments |
| PAHO | Pan American Health Organization |
| PAHO/WHO | Pan American Health Organization / World Health Organization |
| PAL | Professional Advising Leadership |
| PAMGMA | Pennsylvania Medical Group Management Association |
| PAMRA | Peace Accord Mnf Returnees Association |
| PAMRA | Performing Artists Media Right Association |
| PAMRA | Performing Artists Media Rights Association |