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John Logie Baird, a Scottish inventor, demonstrated the first working television system, the 'Televisor', in 1926. This electromechanical device used a spinning Nipkow disk to scan images, converting ...
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John Logie Baird, a Scottish inventor, demonstrate...

WWII German military Enigma machine display in International Spy Museum.Washington D.C.USA
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WWII German military Enigma machine display in Int...