Which invention, first commercially used in 1974 on a pack of Wrigley's gum, revolutionized retail by allowing automated price lookup and inventory tracking?

The retail landscape has been dramatically transformed by key technological innovations throughout history. These breakthroughs have revolutionized how products are sold, tracked, and purchased. This trivia question focuses on a pivotal invention that fundamentally altered retail operations worldwide and continues to impact virtually every shopping experience today. Test your knowledge about this game-changing retail technology!

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