Which company pioneered the first widely-used retail personalization algorithm that could generate individual product recommendations based on previous purchase history?

The world of retail was forever changed with the introduction of sophisticated personalization algorithms. These systems analyze customer behavior and preferences to create tailored shopping experiences. But do you know when this revolution began? Test your knowledge about the technological innovations that transformed how retailers connect with consumers through data-driven personalization.

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Amazon with its 'item-to-item collaborative filtering' algorithm (1998)
Walmart with its 'ShopperInsight' system (1995)
eBay with its 'BuyerMatch' technology (2001)
Netflix with its 'Cinematch' algorithm (2000)