Not long ago, the U. S. Postal Service (USPS) marked the 50th anniversary of the ZIP Code.
I didn’t notice much fuss about the event, but without question, ZIP codes have made their mark in this country. ZIP, by the way, is an acronym for “Zone Improvement Plan.”
In 1963, ZIP codes replaced numbers we used to insert between the city and state when addressing our mail. I lived in postal zone 10 in Milwaukee, so my mail came to my street address, and the third line in the address read, “Milwaukee 10, Wisconsin.”
With the amount of mail increasing back in ’63, the Post Office Department needed a more organized and uniform way to route it, and a postal employee came up with the idea to use three numbers to identify postal sectional centers.