| Abbreviation | Definition |
|---|---|
| PBA | Performance Based Assessment |
| PBGC | Pension Benefit Guaranty Corporation |
| PBIS | Performance Based Inspection System |
| PBPK(M) | Physiologically based pharmacokinetic model |
| PBR | Professional Bull Riders |
| PBS | Preferential Bid System |
| PBS | Public Broadcasting Service |
| PBS | Public Broadcasting System |
| PBS | Public Buildings Service |
| PBSA | Performance Based Services Acquisition |
| PC | Peace Corps |
| PC | Penn Charter |
| PC | Post(al) Card |
| PC | Presidents Council |
| PC | Privatization and Cuts |
| PC | Public Convenience |
| PCA | Per Capita Apportionment |
| PCA | Pro-Children Act of 1994 (PL 103-227) |
| PCAP | Priority Country Area Program |
| PCAST | President's Council of Advisers on Science and Technology |