The Universal Product Code ( UPC) is a barcode symbology (i.e., a specific type of barcode) that is widely used in the United States, Canada, the United Kingdom, Australia, New Zealand, and in other countries for tracking in stores. Its most common form, the UPC-A, consists of 12 , which are uniquely assigned to each trade item. Along with the related EAN barcode, the UPC is the barcode mainly used for scanning of trade items at the point of sale, per GS1 specifications.http://www.gs1us.org/standards/barc..
Individual product pages contain customer reviews, related image and media, and can be modified to provide custom content. The site performs queries against UPC, ISBN, and EAN database API in addition to bar codes submitted by registered users.