Both of the New York World's Fairs in the 20th Century were watershed moments in the history of television technology. Millions of visitors flocking to Flushing-Meadows Park in Queens were introduced to television and its potential during the 1939-1940 fair, while in 1964-1965 many got to walk through the wondrous television studio set up by RCA and see a color broadcast for the first time. More than any events, the two fairs succeeded in getting the masses excited about the magic box that has helped create today's couch surfers and binge-watchers. Here are the key moments in the history of television technology, from 1939 and beyond.