Barcode – UPC-A
UPC-A is the most common and well-known symbology in the USA, it is used for marking products which are sold at retail in the States, you can find it on virtually every consumer goods in supermarkets, as well as books, magazines, and newspapers.
The barcode identifies the manufacturer and specific product so point-of-sale cash register systems can automatically look up the price. The UPC-A Code and the assignment of manufacturer ID numbers is controlled in the U.S.A. There are a number of UPC variants, such as UPC-E, UPC 2-digit Supplement, UPC 5-digit supplement.
UPC-A encodes 11 digits of numeric data along with a trailing check digit, for a total of 12 digits of barcode data.