Which groundbreaking retail invention, patented in 1974, allowed stores to automatically track inventory and revolutionized checkout speeds worldwide?

The world of retail has been transformed by numerous inventions and discoveries throughout history. From barcode scanners to digital payment systems, these innovations have revolutionized how we shop. This trivia question focuses on a pivotal invention that changed retail forever, testing your knowledge about the origins of modern shopping experiences and the technological breakthroughs that made today's retail landscape possible.

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• The Universal Product Code (UPC) barcode system
• The electronic cash register (ECR)
• The credit card magnetic stripe reader
• The automated teller machine (ATM)

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