The barcodes follow the UPC-A, UPC-E, EAN-8 or EAN-13 standards.
http://en.wikipedia.org/wiki/Universal_Product_Code
http://en.wikipedia.org/wiki/European_Article_Number
The barcodes follow the UPC-A, UPC-E, EAN-8 or EAN-13 standards.
http://en.wikipedia.org/wiki/Universal_Product_Code
http://en.wikipedia.org/wiki/European_Article_Number