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Shirley Ann Jackson
Jackson invented Caller I.D. on telephones, which recognises and displays incoming call telephone numbers. This allows telephone users to check both known and unknown calls, and to know who was calling them before they answered. We take this for granted today, but it was revolutionary at the time! She also developed the Call Waiting feature, touch-tone telephone, and the portable fax machine.
Category
Inventors
Age Range
8+


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