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Associated Press
Christopher Jacques, 22, uses his index finger to pay for an Italian soda at a coffee shop at the South Dakota School of Mines and Technology on Friday Feb. 15, 2013. Jacques, an electrical engineering major from Pacific, Wash., is one of about 50 students and four faculty members at the school enrolled in a pilot program that uses Biocryptology -- or one's fingerprint and hemoglobin -- in place of cash or credit cards to pay for items. (AP Photo, Amber Hunt)

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