Which famous e-commerce company first implemented the 'collaborative filtering' algorithm that revolutionized product recommendations based on mathematical analysis of customer behavior?

The retail industry has been transformed by mathematical innovations that optimize everything from inventory management to customer recommendations. Behind some of the most successful retail technologies are sophisticated algorithms and mathematical models that drive sales and enhance customer experience. Test your knowledge about how mathematical innovations have revolutionized retail brands and shopping experiences.

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Amazon
eBay
Alibaba
Walmart