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You see them everywhere--the simultaneously tuned-in, tuned-out people. You'll recognize them by their enigmatic smile and faraway look as they jog, skate, commute, or wander the aisles of the supermarket. When answering questions, they use an unnaturally loud voice, though not unfriendly.
That's how we described, in 1981, those folks who first sported what we called walkaround tape players. Portable, personal, and already chic, these gadgets enabled ...