Which retail innovation, first used commercially in 1974, was described by the Smithsonian as 'one of the 10 greatest inventions that changed humanity'?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions have fundamentally changed how we shop and interact with products. This trivia question focuses on a pivotal invention that revolutionized retail inventory management and product identification, setting the foundation for modern commerce systems we now take for granted.

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• The Universal Product Code (UPC) barcode system
• The electronic cash register (ECR)
• The shopping cart with foldable basket
• The credit card magnetic stripe

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