| Rank | Abbreviation | Meaning |
|---|
| ***** | PCAR | Post Contract Award Review
| |
| *** | PCAR | Preliminary Contamination Assessment Report
| |
| *** | PCAR | Point Contact Andreev Reflection
| |
| *** | PCAR | Paging Channel and Access Response
| |
| *** | PCAR | Presumed Circle Area Ratio
| |
| ** | PCAR | Principal Components Analysis of Residuals
| |
| ** | PCAR | Presidential Coalition for Athletic Reform
| |
| ** | PCAR | G-protein-coupled calcium receptor
| |
| * | PCAR | Palliative Care Association of Rwanda
| |
| * | PCAR | presumed circular area ratio
| |
| * | PCAR | Philippine Council for Agricultural Research
| |
| * | PCAR | Placer County Association of Realtors
| |
| * | PCAR | PA Coalition Against Rape
| |
| * | PCAR | Perfumery and Cosmetics Association of Russia
| |
| * | PCAR | plasma cell-rich acute rejections
| |
| * | PCAR | Platform Core Activity Request
| |
| * | PCAR | Peace Corps for African Renaissance
| |
| * | PCAR | Post Cruise Assessment Report
| |
| * | PCAR | Procurement Capacity Assessment Report
| |
| * | PCAR | Papillon Club of America Rescue
| |
| * | PCAR | Pennsylvania Coalition Against Rape
| |
| * | PCAR | Pacific Coast Airline Railway
| |
| * | PCAR | Practitioner Centred Action Research
| |
| * | PCAR | Primary Curriculum and Assessment Reform
| |
| * | PCAR | Pneumocystis Carinii
| |