VIDEOCASSETTE (1951)
The first video recording was made in 1951, years after RCA built the signature recorder. In 1956 the company sold the first 3M Scotch video bandwidth.
http://www.diariohacker.com/wp-content/uploads/2006/12/qu50055205bo_black_video_cassette_housings.jpg
ARTIFICIAL SATELLITE (1957)
Former Soviet Union in 1957, a rocket launched the first artificial satellite, Sputnik 1. United States did not take long to send yours today there are hundreds orbiting the earth for different purposes, meteorological, military, telephony, television, observation, etc. video.
http://www.100pies.net/Gifs/Astronomia/Satelites/satelite-06.gif
THE RADAR (1952)
In the 50's delved into the theoretical basis of radar, were able to determine the limits of detectability achievable, positioning, speed, etc. Some fundamental…