Which revolutionary retail technology, invented by Norman Joseph Woodland and Bernard Silver, was first commercially used in 1974 on a pack of Wrigley's gum?

In the world of retail innovation, certain technological breakthroughs have fundamentally transformed how consumers shop. This trivia question focuses on a groundbreaking invention that revolutionized retail checkout processes worldwide and continues to impact product identification and inventory management today. Test your knowledge of this pivotal retail technology that bridged analog shopping with the digital age.

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Universal Product Code (UPC) barcode
RFID (Radio-Frequency Identification) tags
Digital price scanner
Electronic Article Surveillance (EAS) system