Which revolutionary retail technology was first used commercially in 1974 on a pack of Wrigley's chewing gum, forever changing how products are identified and tracked?

The retail landscape has been transformed by technological innovations that changed how we shop forever. Some inventions started as small experiments but went on to revolutionize entire industries. This trivia question focuses on a pivotal retail technology that fundamentally altered the shopping experience worldwide and created new possibilities for product identification and inventory management.

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UPC Barcode
RFID Tags
NFC Payment System
Electronic Shelf Labels