Which retail company was the first to implement large-scale item-to-item collaborative filtering algorithms for personalized product recommendations in the late 1990s?

In the competitive world of e-commerce, personalization algorithms have revolutionized how retailers engage with customers. These sophisticated systems analyze browsing history, purchase patterns, and demographic information to create tailored shopping experiences. But which retail giant was the true pioneer in implementing large-scale algorithmic personalization that fundamentally changed the retail landscape? Test your knowledge of this pivotal development in modern retail history.

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Amazon
Walmart
eBay
Best Buy