Which company pioneered the first large-scale product recommendation system in e-commerce that used collaborative filtering technology?

Recommendation systems have transformed the retail landscape, creating personalized shopping experiences that boost sales and customer satisfaction. But how well do you know the history of these powerful tools that suggest products based on your behavior? Test your knowledge about the origins of retail recommendation technology that powers many of today's most successful e-commerce platforms.

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Amazon with its 'Customers Who Bought This Also Bought' feature (1998)
eBay with its 'Similar Items' recommendation engine (1997)
Netflix with its movie suggestion algorithm (2000)
Yahoo! with its 'Shopfinder' product matching system (1996)