Sporting “I Got Chipped” T-shirts, some 40 workers at Three Square Market, a firm that makes cafeteria kiosks aimed at replacing vending machines, got tiny rice-sized microchips embedded in their hands. Company officials said it was for convenience, a way for them to bypass using company badges and corporate log-ons to computers. Now, they can just have their hands read by a reader, similar to using a smartphone to pay for goods. 

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