July 19

1963 – Joe Walker flies a rocket-powered aircraft to a record altitude of 106,010 meters, a flight which technically qualifies as human spaceflight under international convention.
1977 – The world's first Global Positioning System (GPS) signal was transmitted from Navigation Technology Satellite 2 (NTS-2) and received at Rockwell Collins in Cedar Rapids, Iowa.
1983 – The first three-dimensional reconstruction of a human head in a CT is published.