A Retail Standard That Turned Checkout Into Infrastructure

Before barcodes, supermarkets had to sticker prices onto individual items, change them when prices moved, and trust cashiers to key everything in correctly. That was slow, expensive, and full of mistakes. Grocers also had a weak view of their own shelves: they often knew what had shipped to stores better than what had actually sold. The barcode standard would change that forever.

The idea started in 1948, when Bernard Silver overheard a grocery executive asking Drexel Institute to find a way to read product information automatically at checkout. Silver and Norman Joseph Woodland turned that problem into a patent filing in 1949, inspired in part by Woodland drawing lines in the sand like Morse code stretched sideways. Their 1952 patent described a machine-readable symbol, but the technology and economics were not ready. The breakthrough came two decades later, when the grocery industry formed an ad hoc committee in 1970 and chose the Universal Product Code on April 3, 1973.

Even then, adoption was not automatic. On June 26, 1974, a Marsh supermarket in Troy, Ohio, used a scanner to read a 67-cent, 10-pack of Wrigley’s Juicy Fruit gum, the first UPC scan. But stores hesitated because scanners were expensive, shoppers worried about accuracy, unions feared job losses, and item-pricing laws reduced the payoff in some states. What finally scaled the system was coordination: a single standard, a council to administer it, falling computing costs, better scanners, and then big retailers like Kmart and Wal-Mart requiring suppliers to barcode goods in the 1980s. Once enough manufacturers and stores moved together, waiting stopped making sense.

That is why the barcode matters far beyond the checkout beep. It made inventory visible, sped up lines, fed sales data back to manufacturers, and helped turn retail into an information system. The striped box on a cereal carton now sits inside supply chains, warehouses, hospitals, and airport baggage systems because the hard part was never printing lines. The hard part was getting rivals to agree on one language, then making it cheap enough that staying outside no longer made sense.Go deeper: Reading Between the Lines – David A. Price

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