Which retail technology invention, first used commercially in 1974 on a pack of Wrigley's chewing gum, revolutionized inventory management and is now used in virtually all retail environments worldwide?

In the world of retail, technological innovations have transformed how customers shop and how businesses operate. From humble beginnings to global adoption, certain inventions have revolutionized the retail landscape and customer engagement strategies. This trivia question explores a groundbreaking invention that fundamentally changed retail operations and customer experience. Test your knowledge about this pivotal retail technology that has become ubiquitous in modern shopping environments.

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Universal Product Code (UPC) barcode scanner
Electronic point-of-sale (EPOS) system
Radio-frequency identification (RFID) tag
Self-checkout kiosk