Transistors invention

a transistor is a semiconductor device with at least three terminals
Shockley, Bardain at Brattain presented a functional concept on 23th December 1947 to some Bell Labs colleagues and managers
"2,913,276,327,576,980,000,000 transistors shipped since the moment of invention" (forbes.com, 2014)

https://commons.wikimedia.org/wiki/File:Transistor_basic_flow.svg (Fattredd, 2012, CC BY-SA)

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