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Chronology

  1. 1844

    'What hath God wrought': the telegraph

    Samuel Morse's line between Washington and Baltimore carried the first formal message in code — information traveling without any physical carrier to see.

  2. 1876

    Bell patents the telephone

    Alexander Graham Bell's patent — hours ahead of a rival filing — turned the telegraph's clicks into the human voice over wire.

  3. 1969

    ARPANET sends its first packets

    The first node at UCLA attempted to log in to a machine at SRI; the system crashed after 'LO' — but packet switching worked, and the network grew.