Ciro Santilli @cirosantilli 37

By William Shockley in 1948 also at Bell Labs Murray Hill.

As of 2020, not used anymore in logic gates, but still used in amplifiers.

A solid-state electronic switch and amplifier.

Although transistors were revolutionary, it is fun to note that they were just "way cheaper and more reliable and smaller" versions of exactly the main functions that a vacuum tube could achieve