| 1. | (hardware) | PCB - Power Circuit Breaker. | |
| 2. | (hardware) | PCB - Power Control Box. | |
| 3. | (hardware) | PCB - Printed Circuit Board. | |
| 4. | PCB - Process Control Block. | ||
| 5. | PCB - Product Configuration Baseline. | ||
| 6. | PCB - Program Control Block. | ||
| 7. | (networking) | PCB - Protocol Control Block. (TCP). |