Beginning with a 10-pack package of Wrigley's chewing gum that now resides at the Smithsonian, supermarkets have been scanning bar-coded packaged goods for more than 34 years. During this time, bar-code scanning based on the 12-digit Universal Product Code (UPC) has brought about revolutionary efficiencies for North American retailers and given them massive amounts of data with which to analyze their stores. But it has largely overlooked key perishables departments, such as loose produce ...

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