Source : Free On-Line Dictionary of Computing

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