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Cave drawings have used in 40.000.000 BC. First mean of communication registrated in the human history.

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Smoke Signals have used by romans in 150 AC but also have been used by indian. They have been used principaly to military forms to know if a base has been attacked.

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Letters has been invented aproximately 500 BC. It was a paper with a text, then a person took the letter and goes to the
reciever.

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Telegraph has been created in 1845, it  send messages in morse code, principaly used for miltitary things.

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The radio have been invented in 1890 AC. It was basically a box with an antenna that have some bottons to change the canales and hear the News

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The first desk computer has been created in 1964, the computer is a screen with a keyboard and a mouse, the principally uses of it is matemathics and communication.

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The first cellphone has been created in 1973, it is a portable tool, so you can take it and go with your cellphone to other place. The first cellphone are only for call people.