| Abbreviation | Definition |
|---|---|
| PW | Pressure Wave |
| PW | Pulse Width |
| PWA | Printed Wiring Assembly |
| PWB | Printed Wiring Board |
| PWC | Pulse Width Control |
| PWD | Pulse Width Deviation |
| PWE | Pseudo Wire Emulation |
| PWJ | Printed Wiring Junction |
| PWM | Pulse-Width Modulation |
| PWMI | Pulse Width Modulated Inverter |
| PWP | Particles per Wafer Pass |
| PXC | Photonic Cross Connect |
| PXI | Photonics Switching Interface |
| PXJ | Photonics Switching Junction |
| PXM | Playstation Xbox Modification chip |
| PXO | Phase Locked Crystal Oscillator |
| PXO | Precision Crystal Oscillator |
| PXS | Phase Locked Crystal Source |
| PYS | Photo Yield Spectroscopy |
| PZT | Piezoelectric Transducer |