BAR CODE given that the definition of the SAR is inaccurate step to redefine the concept. Bar codes are a conversion of the numbers assigned to products, packaging, fixed asset, books, commercial premises, articles, documents, laboratory samples, etc. called codes, to combinations of vertical bars (1D scheme) or other scheme such as QR code (2D scheme). The merchandise codes are mostly enclosed, more than 100 countries and more than 1 million companies, to the first standard that was EAN 13 (European Article Number) and which in 2005 was unified with the UCC. The number 13 is because it consists of 13 digits and a character, the ANTILAMDA ( > ). The first 3 digits are for the country code. The following 4 or 5 are the company code. The following 6 or 7 are the product code. Finally, digit 13 is a control digit ( verifier), which allows the scanner software to verify that the reading was correct. Then comes, not always, an anti-> so that there is minimal white space on the right side of the bars that ensures a correct capture of the reader. On the left side is not required, as the first number goes outside the bars, precisely for the same purpose. The same product can have multiple codes assigned according to its packaging. A beer pallet, a box, a six-pack and a simple unit will have 4 different codes in order to manage the stock properly in the warehouses, transport and in the commercialization in detail. In fact, 3 or all 4 of them may be being used simultaneously.