Summary: In 1850 – The first U.S. patent for push-key operation of a calculating machine was issued to Dubois D. Parmelee of New Paltz, N.Y. In 1944 – At Bletchley Park in Great Britain, the Colossus Mk I attacked its first Lorenz-encrypted message. Enigma had been cracked but Lorenz was a tougher cipher used in communications…Read more →
