Which innovative retail recommendation system, launched in 1998, is widely considered the first large-scale implementation of collaborative filtering technology for consumer products?

Before AI and algorithms dominated retail recommendation systems, merchants used various methods to suggest products to customers. This poll explores a pivotal moment in retail history when recommendation systems began their transformation from purely human intuition to data-driven approaches. Test your knowledge about this important shift in consumer behavior analysis and retail strategy!

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Amazon's 'Customers Who Bought This Also Bought' feature
eBay's 'Similar Items You Might Like' system
Walmart's 'Smart Shopping Assistant' program
Barnes & Noble's 'BookMatch' recommendation engine