How Does Barcode Scanner Work in Supermarket? Barcodes have become an essential part of the retail industry, revolutionizing the way products are tracked and managed in supermarkets. In this article, we will explore the fascinating world of barcode scanners, starting with an overview of barcode technology. We will then delve into the components of a barcode scanner, explaining how these devices are able to read and decode the information stored in barcodes. Additionally, we will discuss how barcode scanning works, shedding light on the process that occurs when a product is scanned at the checkout. Finally, we will highlight the numerous benefits that barcode scanners bring to supermarkets, from improved inventory management to faster and more accurate transactions.