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Bell Labs engineers John Bardeen, Walter Brattain, and William Shockley demonstr
Featured Event 1947 Event

December 23

The Transistor Emerges: Revolutionizing Electronics

Bell Labs engineers John Bardeen, Walter Brattain, and William Shockley demonstrate the first working point-contact transistor, instantly replacing bulky vacuum tubes with a tiny, reliable semiconductor switch. This breakthrough shrank electronics from room-sized machines to pocketable devices, launching the digital age that powers everything from smartphones to modern medical equipment.

December 23, 1947

79 years ago

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What Else Happened on December 23

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