Since my hubby is a letter carrier, I thought of Z for Zip code.
Did you know that zip codes started on July 1, 1963? It did not become mandatory until 1967. And that ZIP is the abbreviation for Zoning Improvement Plan? It's always "cool" to learn something new OR relearn things we've forgotten about.
Happy Z Monday! go to http://unglazed.blogspot.com/ by Jen to see other "Z"s