Point-contact transistor

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Science and technology

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What Wikipedia says

The point-contact transistor was the first type of transistor to be successfully demonstrated. It was developed by research scientists John Bardeen and Walter Brattain at Bell Laboratories in December 1947. They worked in a group led by physicist William Shockley.

Excerpt from the Wikipedia article “Point-contact transistor”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Windell Oskay from Sunnyvale, CA, USA, CC BY 2.0, via Wikimedia Commons.