Which retail innovation, introduced in 1974, first enabled stores to systematically track individual product sales and revolutionized retail data analytics?

In today's data-driven retail environment, consumer behavior analytics shapes everything from store layouts to pricing strategies. But the systematic collection and analysis of shopper data has deeper roots than many realize. Test your knowledge about a pivotal innovation that transformed how retailers understand their customers and revolutionized the retail industry's approach to consumer insights.

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Universal Product Code (UPC) barcode scanning
Electronic point-of-sale (EPOS) cash registers
Store loyalty card programs
IBM's Retail Information System (RIS) software