The bar code is a graphic representation of the product code (GTIN).

The code consists of a series of numbers called GTIN (Global Trade Item Number) and has 13 digits. The symbol allows for automatic data entry each time the article is read. A barcode is a graphic transcription of a number. The code and barcode form an inseparable whole for identification at checkout. Barcodes are the traceability system used by most companies in all industries.