In pictures: Transistor history
Vacuum tubes were replaced by
transistors - a type of electronic switch - invented by William
Shockley, John Bardeen and Walter Brattain at Bell Labs.
The first working transistor was shown off just before Christmas in 1947, but was only revealed to the public six months later.
In 1965 the Intel co-founder Gordon
Moore, writing in Electronics magazine, correctly predicted that the
number of transistors on a chip would double every year.
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