Which groundbreaking retail analytics innovation, first implemented in 1974, allowed mass retailers to track individual product sales and revolutionized inventory management?

The retail landscape was forever changed when companies began leveraging data analytics to understand customer behavior. One particular innovation revolutionized how retailers track, analyze, and respond to consumer purchasing patterns. This discovery fundamentally transformed inventory management, personalized marketing, and the overall shopping experience. How well do you know the history of retail analytics technology that powers today's shopping experience?

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Universal Product Code (UPC) barcode scanning system
Radio-frequency identification (RFID) inventory tracking
Point-of-sale (POS) credit card processing terminals
Electronic Article Surveillance (EAS) anti-theft technology