PCU
PCU stands for:
- Packet Control Unit , part of the GSM cellular network
- Power Control Unit , a power control unit
- Photo Conductor Unit, English abbreviation for image drum
- PCU (film) , a 1994 comedy film
- Peak Concurrent Users, the maximum number of users to be processed by a server or server cluster
- Pre-Commissioning Unit, a name prefix for a United States ship that has not yet been commissioned