In 1947 – The first closed-circuit broadcast of a surgical operation showed procedures to observers in classrooms at Johns Hopkins University.
In 1954 – The Westinghouse H840CK15 goes on sale in the New York area. It is generally agreed to be the first production receiver using NTSC color offered to the public. Only 30 sets were sold at $1295 a pop.
In 1959 – Discoverer 1 was launched on a Thor-Agena A rocket and became the first man-made object ever put into a polar orbit.