[T]he highway will also make it possible for an individual to keep track of his or her own whereabouts--to lead what we might call “a documented life.” Your wallet PC will be able to keep audio, time, location, and eventually even video records of everything that happens to you. It will be able to record every word you say and every word said to you, as well as body temperature, blood pressure, barometric pressure, and a variety of other data about you and your surroundings. It will be able to track your interactions with the highway--all of the commands you issue, the messages you send, and the people you call or who call you. The resulting record will be the ultimate diary and autobiography, if you want one.
Bill Gates, The Road Ahead (New York: Viking, 1996), p. 303.
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