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Joseph Nicéphore Niépce used the Camera Obscura to create the first photograph. It needed eight hours worth of light to be seen and then quickly faded away
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The morse code was used for radio communication, before people could transmit voice. In the late 19th and early 20th centuries the most high speed international communication used Morse code.
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Alexander Graham Bell has the credit for the creation of the first practical telephone, but Antonio Meucci actually came up with the idea of the 'talking telegraph'.
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Photophony was invented at around 1880. It is a device that uses light beams to transmit a message.
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In 1887, Heinrich Hertz discovered radio waves. In 1894, Guglielmo Marconi developed the wireless telegraph using radio waves. without Heinrich's great discovery we would not have television.
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In the late 1870s, the concept of videotelephony spreaded in Europe and the USA. It is the concept of the addition of live video to voice telecommunication.
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The first satellite was made in 1958. The satellite was used to relay and amplify radio communications using transponders.
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Tim Berners-Lee invented the World Wide Web in 1989. The World Wide Web is abbreviated as WWW this is in every single link (example) https://www.google.com
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The IBM Simon was the first smartphone.
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In 1998, Sergey Brin and Larry Page created Google, one of the most widely used search engines.