I believe you are not quite correct on the letters: should be: PCB : Printed Circuit Board PCBA : Printed Circuit Board Assembly Sometimes the PCBA is substitued for PWB which stands for Printed Wiring Board or Printed Wired Board - I not sure. But not that often! best Doug Mills *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************