Which invention, first used commercially in 1974 on a pack of Wrigley's chewing gum, revolutionized retail by enabling automated checkout and inventory management?

The retail landscape has been dramatically reshaped by technological innovations throughout history. Some inventions fundamentally changed how we shop and interact with products. This trivia question focuses on a pivotal invention that transformed the retail industry by enabling accurate product tracking, inventory management, and streamlined checkout processes worldwide. Test your knowledge about this revolutionary retail technology!

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Universal Product Code (UPC) barcode
RFID (Radio-Frequency Identification) tag
Electronic price tag
Digital receipt system