ZIP Code: With the Swingin' Six (2015) - FAQ
Frequently asked questions about this film.
How much mail did the post office deliver by 1948?
By 1948, the volume of mail delivered had leaped to 20 billion pieces.
What was the volume of mail delivered in the year mentioned in the documentary?
The volume of mail delivered nearly doubled to 80 billion pieces in the year mentioned.
What is the purpose of a zip code according to the documentary?
A zip code is used for mail distribution to ensure faster service, lower costs, and fewer mistakes.