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pager

By acarrillo083

  • pager

    pager
    Invented in 1921, pagers (also known as beepers) were used by the Detroit Police Department when they successfully put a radio-equipped police car into service. In 1959, the term “pager” was coined by Motorola. By the 1970s, tone and voice pagers were invented. in the last 1990s they stopped being used because of telephones