On July 1, 1963, a ZIP Codes program was launched in the United States, can you even imagine an address without one?

ZIP Codes are standard on every address in the United States, but this wasn’t always the case. Prior to 1963, these five digit (since expanded to nine digit) codes were only used in larger city populations. But as the towns grew, so did the need for postal service zoning.

ZIP stands for Zone Improvement Plan but the term was also chosen to conjure thoughts of speedy delivery; using the new codes meant your mail could be routed more efficiently and thereby arriving sooner.

Still sounds a little boring, right? You’ll change your mind once you hear the catchy advertising jingle that aired all over the country. Find out more about the birth of our current postal system in the video below: