Invented by Norman Joseph Woodland and Bernard Silver and later optimized by George Laurer into the popular form we know today, barcodes are ubiquitous. No two barcodes are similar - which is why this tool finds wide-scale application in the retail industry (and associated others) to help determine accurate records, besides Stock Keeping Units (SKUs) sold. To access the data stored in a bar code, one needs a barcode scanner or similar device, from left to right. A barcode is a machine-readable information (usually numbers, characters, or a combination of both) stored and printed visually in the form of parallel bars and spaces on an easily scannable surface. Every product and good sold or rented - from apparel and clothing to library books and hospital patient cards - will accompany a barcode. The barcode is an essential technological element we encounter and interact with in everyday shopping life.
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