What keeps hearts ticking, missiles on track and mobiles ringing?
By Nick Heath
Published: 29 January 2008 10:00 GMT
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The transistor was invented by Bell Labs scientists John Bardeen, Walter Brattain and William Shockley to replace the vacuum tube. It soon proved its worth with its ability to amplify electrical signals and to switch them on and off.
Photo credit: LSI Corporation
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Agenda Setters 2009
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