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Samuel Morse invented the Telegraph.
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Thanks of the invention of the telegraph, appeared a lot of new advances. Appeared multiplexing, used for seeing more than one message in the same time through one cable.
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The first transcontinental telegraph was invented.
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Later appeared the sea cable, allows to connect two continents for the first time. One example is Europe and America.
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Appeared the telephone with cable by Alexander Graham Bell.
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Lastly it appeared the telephone without cable, the one that is in our home now a days.
