| Developed
by John Bardeen, Walter Brattain, and William Shockley at the Bell
Laboratories in 1947, a transistor is
made up of semi-conductors and is a component used to control the
amount of current or voltage
and/or used for amplification/modulation or switching of an electronic
signal. In 1954,
IBM announced it was no longer
planning to use vacuum tubes in its
computers and introduced its first computer that had 2000
transistors. Transistors quickly replaced vacuum
tubes and today are found in virtually all electronic devices.
Also see: Electronics
definitions, IC, Moore's
Law, Power definitions,
Solid-state device
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