Some of you may remember, somewhere between the Dark Ages and the Pony Express, that writing an address was simple. You didn’t even need to keep an address book. As long as you knew the city and state you were fine. It looked something like this:
 
Mrs. Marvin Adams
San Angelo
Texas

That was it. No 10-digit zip codes. No street addresses (except in big cities). No two-letter state abbreviations. In fact, if the addressee lived in the same city as the sender, you could eliminate the city and state names and simply write the street address with “City” on the following line.