What is a Barcode?

A barcode is a series of black and white (or contrasting) spaces (usually lines) scanned by a barcode scanner or cell phone app to convey a small amount of information. Barcodes are mostly used on retail products to establish the price at the checkout and ensure that the entire process is efficient. Barcodes used in retail are either EAN-13 Numbers or UPC-A numbers represented as an image. These numbers have linked the products in the store’s system.