PCBU
| 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) |