Which retail technology invention, first used commercially in 1974 on a pack of Wrigley's gum, led to an estimated 30% improvement in checkout efficiency and revolutionized inventory tracking?

Test your knowledge about a groundbreaking retail technology innovation that revolutionized how consumers shop and businesses track inventory. This invention fundamentally changed supply chain management, product identification, and checkout processes worldwide. While seemingly simple, this technology created ripple effects across multiple industries and paved the way for modern retail analytics and inventory systems.

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Universal Product Code (UPC) barcode
Electronic shelf labels (ESL)
RFID inventory tags
Self-checkout kiosks