Which company first implemented the barcode scanner in a retail store, marking a revolutionary moment in retail innovation history?

The world of retail has been revolutionized by numerous technological innovations that have changed how we shop forever. Behind many of these game-changing retail technologies are fascinating origin stories that even industry professionals might not know. Test your knowledge about the beginnings of a revolutionary retail innovation that transformed the shopping experience worldwide.

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Kroger, which scanned the first UPC barcode on a pack of Wrigley's gum in 1974
Walmart, which pioneered barcode scanning on a carton of milk in 1973
Sears, which first used barcodes on appliance inventory in 1972
IBM, which tested the first retail scanner on its own products in 1969