In 1880 @EcolePolytechniqueParis grad *JulesCarpentier (30 Aug 1851-30 June 1921) invented punched card to record key strokes for the self-playing piano. Born @Paris Died @Joigny Note hopping inspired frequency hopping used in Wi-Fi and GPS

 

 

 

Paris

(@Paris)

112 Rue de Maubeuge, 75010 Paris

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en.wikipedia.org