What You Should Know About Electronics - ThoughtCo
https://www.thoughtco.com/electronics-overview-2698911
Mar 1, 2019 · The first major breakthrough in electronics occurred in 1904, with the invention of the vacuum tube (also called the thermionic valve). Vacuum tubes made possible the invention of TV, radio, radar, telephones, amplifiers, and even microwave ovens. In fact, they were used throughout most of the 20th century and are even in use in some places today.
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