Which pioneering retail innovation from the 1970s first allowed stores to systematically collect and analyze consumer purchase data, revolutionizing retail analytics?

The ability to analyze and predict consumer behavior has transformed retail forever. Behind today's sophisticated recommendation systems and personalized shopping experiences lies a fascinating history of innovation. This trivia question explores a pivotal moment when retail data analytics took a giant leap forward, changing how businesses understand their customers.

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Electronic point-of-sale systems with barcode scanners
Credit card magnetic stripe technology
Early e-commerce websites with tracking cookies
Store membership cards with customer identification