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Universal Product Code. The Universal Product Code (UPC) is a barcode symbology that is widely used in the United States, Canada, United Kingdom, Australia, New Zealand, in European and other countries for tracking trade items in stores. UPC (technically refers to UPC-A) consists of 12 numeric digits, that are uniquely assigned to each trade item.
Retail Product Bar Codes. UPC-A: Virtually all retail products sold in North America (United States and Canada) use the UPC bar code. You can not make up your own UPC bar code number, you must pay the Uniform Code Council (GS1) a fee and they assign your company a range of UPC codes.