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Emergence of cuneiform writing in Mesopotamia.
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Development of writing in different cultures (Egyptian, Chinese, Mayan, etc.).
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Oral and gestural communication.
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Johannes Gutenberg invents the movable type printing press
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Samuel Morse develops the telegraph and Morse code.
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Alexander Graham Bell patents the telephone.
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Guglielmo Marconi makes the first radio broadcasts
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Rise of commercial broadcasting.
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Development of television.
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First message sent through ARPANET, precursor to the Internet.
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Internet and email development.
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Popularization of the World Wide Web
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Expansion of social networks, instant messaging and mobile communications.