title: What is meant by BCD16
body: <p>I'm writing an Ama file generating simulator. In the Ama specifications, it gives the number of bytes(not bits) for a field as BCD16, BCD12 etc(BCD{a number}). </p>
  
  <p>For fields with BCD16 the actual length is 8 bytes. Can anyone please tell me what that BCD16 means ? 
  I know BCD is Binary coded decimal but don't understand what BCD16 means.</p>