| Abbreviation | Definition |
|---|---|
| PAR | Power Angle Regulation |
| PAS | Photo-Acoustic Spectroscopy |
| PAST | Pre-Amp Signal Transfer |
| PAT | Process Action Team |
| PATH | Potomac-Appalachian Transmission Highline |
| PAWS | Portable Acoustic Wave Sensor |
| PB | Partition Balancing |
| PB | PlaBase |
| PB | Power Booster |
| PB | Printed Board |
| PBA | Printed Board Assembly |
| PBBM | Performance Baselining Benchmarking and Monitoring |
| PBD | Pairwise Balanced Design |
| PBET | Performance-Based Equipment Training |
| PBGA | Plastic Ball Grid Array |
| PBL | Poly-Buffered LOCOS |
| PBM | Portable BitMap image format |
| PBN | Pyrolytic Boron Nitride |
| PBNC | Push Button Normally Closed |
| PBOE | Per Band Optical Equalizer |