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In ancient times, people exchanged information with the help of drawings, gestures and sounds.Of course at first the gestures with drawings prevailed, but after a while people began to speak
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Writing appeared a very long time ago. At first these were hieroglyphs and symbols. But then letters appeared. With the help of writing, people could communicate at a distance. They could write letters, books and newspapers. People have been communicating with the help of writing for a very long period of time.
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The first mechanical computer, created by Charles Babbage in 1822, doesn't really resemble what most would consider a computer today.
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In 1876 Alexander Bell created the phone. It's funny that the creator tried to create not a telephone, but a telegraph.
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The first social-network resource was the American portal Classmates.com. With the help of a social network people could find their classmates and communicate with them. Today, social networking is the easiest way to communicate.