hen you crack open your mailbox, it’s almost as if your letters just appear. Long before the days of speedy, overnight mail deliveries, postal service workers meticulously sorted through letters by hand and transported mail on horseback. For more than 250 years, the US Postal Service has worked behind the scenes to build a faster delivery network, and this mission has quietly pushed it to the forefront of technology.
“Most people treat the Postal Service like a black box,” USPS spokesperson Jim McKean tells The Verge. “You take your letter, you put it in a mailbox, and then it shows up somewhere in a couple of days. The truth is that that piece of mail gets touched by a lot of people and machines and transported in that period of time — it’s a modern marvel.”
One of its big breakthroughs took place in 1918 with the introduction of airmail. The USPS worked with the Army Signal Corps to use leftover World War I aircraft to launch the service, and the planes were as barebones as they could get. An excerpt from a 1968 issue of Postal Life called the early aircraft “a nervous collection of whistling wires” with “linen stretched over wooden ribs, all attached to a wheezy, water-cooled engine.”
