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Re:4 bit computer built from discrete transistors by wycx on Friday May 27, 2016 @11:40PM (#11790491)
The idea of the transistor was patented in 1926, but it took all the hard work of making a transistor by the Bell Labs team for discrete transistors to become a reality.

See [1] for an excellent summary of the birth of the transistor.

[1] http://www.amazon.com/Crystal-Fire-Transistor-Information-Te...

Re:4 bit computer built from discrete transistors by jrapdx3 on Saturday May 28, 2016 @12:17AM (#11790561)
The book you reference is no doubt a lot more thorough, but the wikipedia article is a pretty good brief overview: https://en.wikipedia.org/wiki/History_of_the_transistor