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TOM REESE / THE SEATTLE TIMES

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UW team researches a future filled with RFID chips

Professor Gaetano Borriello, left, and Evan Welbourne, a graduate student, are tracking the movements of each other using RFID tags like the one Welbourne wears on his belt, at right. Antennas placed in the hallways at the UW computer-science building collect data as volunteers and objects pass by.