Which retail innovation from the 1970s is considered the first major technological advancement in customer purchase tracking and retail data analytics?

Before digital tracking and loyalty cards, retailers had limited ways to understand customer behavior. This poll explores a pivotal moment in retail history when data analytics fundamentally changed how businesses understood their customers. Test your knowledge about this transformation that shaped modern shopping experiences and marketing strategies.

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The introduction of Universal Product Code (UPC) barcodes, first used commercially in 1974 at an Ohio supermarket
The launch of ARPANET-based electronic cash registers that networked department store inventory in 1972
IBM's first retail-specific database management system released in 1978 called RetailTrak
The implementation of magnetic stripe membership cards at Sears department stores in 1976