". . . post man says it's faster."

Hard for someone my age to imagine that it was 1963, on this day, that zip codes were introduced to make the USPS more efficient. And while many know the Five American's highest charting song, Western Union, fewer know of their '67 paean to what was at the time a four year old post office innovation.
  
Why mess with a winning formula. Interesting that two of the Five Americans' highest charting songs were about methods of communication designed to work over great distances. Could this have something to do with the fact that they were from Oklahoma? Cue their big hit, please ...