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 1974 – The U.S. space probe Mariner 10 returned the first close-up images of Venus…Read more →
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 1974 – The U.S. space probe Mariner 10 returned the first close-up images of Venus…Read more →