Wiretapping and Electronic Surveillance in America, 1862-1920

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Gives a faithful overview of the history of tapping: it all started in 1910, when the dictograph arrived and made it easier still for people to engage in spying telegraphic communications. It was the first ready-to-use bug that anyone could employ - that is, buy it off the shelf and use it with no prior training required. Politicians dictographed other politicians, corporations dictographed labor unions, stockbrokers bugged other stockbrokers, and the police dictographed everybody.