The Post Card Exchange discussion

I've just listened to the 99% Invisible podcast episode about the US postal service. It was broadcast on 26 August and comes off the back of a book How the Post Office Created America: A History by Winifred GallagherReally good.
There is also the fascinating episode about - The Address Book: What Street Addresses Reveal About Identity, Race, Wealth, and Power by Deirdre Mask

You might also enjoy a podcast called The Postcardist, which has 90 episodes to date, the most recent of which is on World Postcard Day, last Thursday. There's a single episode, from June 18, 2018, about Deltiology, or collecting postcards, on the podcast Ologies with Alie Ward. Happy listening!