Which company first implemented product recommendation algorithms at scale for e-commerce, famously using collaborative filtering to suggest books to customers?

E-commerce recommendation systems have transformed how we shop online, suggesting products based on our browsing history, purchases, and similar customer behaviors. These sophisticated algorithms drive significant revenue for online retailers through cross-selling and upselling opportunities. Test your knowledge about the origins of this revolutionary retail technology that powers personalized shopping experiences across the digital marketplace.

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Amazon
eBay
Barnes & Noble
Walmart