The UPC may be the most recognizable 1D Machine Readable Code, but there are many other formats. Whereas US merchants use UPC, EAN-13 and EAN-8 are typically used by retailers outside the US. Code 39 is used in the automotive and defense industries while ITF-14 may be used for logistics purposes. Regardless of the dataset used, they all have something in common; there needs to be a means to print them product packaging.