| Acronym | Definition |
|---|
| PCBU➣Physical Layer Control Block Upstream |
| PCBU➣Project Costing Business Unit (various locations) |
| PCBU➣Person Conducting a Business or Undertaking (Australia) |
| PCBU➣Passenger Car Business Unit (India) |
| PCBU➣Personal Computer Business Unit |
| PCBU➣Police Cruiser Backup Unit (Star Wars) |