DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   PCB
      1. <hardware> Power Circuit Breaker.
      2. <hardware> Power Control Box.
      3. <hardware> Printed Circuit Board.
      4. Process Control Block.
      5. Product Configuration Baseline.
      6. Program Control Block.
      7. <networking> Protocol Control Block.
      (TCP).