![]() For example, a UPC code (the type of barcode you see on products at the store) can store up to 12 digits. This is especially useful in large warehouses and retail stores where there are hundreds or even thousands of different products.īarcodes can store a lot of information in a small space. In many places, barcodes have replaced the need for people to keep track of inventory by hand. A scanner reads the barcode by shining a red light on it and measuring the amount of reflected light. The width of the bars and the spaces in between them determine what number is being encoded. There are two main types of barcodes: linear or 1D barcodes, and 2D (matrix) barcodes.īarcodes work by reflecting light off of the black and white bars. Barcodes are widely used in supermarkets worldwide for pricing and product identification. A Barcode is an optical machine-readable representation of data relating to the object to which it is attached.
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