Which company first implemented a sophisticated product recommendation system called 'item-to-item collaborative filtering' in the late 1990s that fundamentally changed online retail?

Before AI and algorithms dominated the e-commerce landscape, certain companies pioneered the concept of personalized product recommendations that revolutionized retail. These early innovations fundamentally changed how consumers discover products and how retailers boost sales through cross-selling and upselling. Test your knowledge of retail technology history and the groundbreaking recommendation systems that shaped modern shopping experiences.

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Amazon
eBay
Netflix
Walmart