Today in 20th century tech history
July 23
In 1903: Ford sells its first car, a Model A.
In 1926: Fox Film buys the patents for the Movietone sound system for recording sound onto film.
In 1962: Telstar relays the first live trans-Atlantic television signal.
In 1972: The United States launches Landsat 1, first of the Landsat satellites, which have collectively taken millions of photographs of the Earth.
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