When you&#x27;re talking supply chain, be advised that there are more symbologies and more uses of them than the UPC or EAN codes used at retail checkstands. Most companies do use a unique or semi-unique number to identify a unit as it&#x27;s moving through their processes. They also barcode the model number as well.<p>Barcode would absolutely allow you to differentiate between any two cell phones, or cars, or computers.