... the cashier Sharon Buchanan scanned a ten pack of chewing gum according to the UPC standard (Universal Product Code) in a supermarket in Troy, Ohio.
The code had, however, already been developed and patented at the end of the 40s by two students of the Drexel Institute of Technology in Philadelphia: Joseph Woodland and Bernard Silver.
Further information:
http://en.wikipedia.org/wiki/Barcode
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