Which retail personalization algorithm invention was the first to use collaborative filtering to recommend products based on similar customer preferences?

The world of retail has been transformed by numerous technological inventions and discoveries. From the way products are displayed to how customer data is analyzed, innovations continue to reshape shopping experiences. This trivia question focuses on a significant technological breakthrough that revolutionized personalization in retail. Test your knowledge about when this game-changing retail technology first emerged!

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Amazon's Item-to-Item Collaborative Filtering (1998)
Netflix Prize Algorithm (2006)
Google's PageRank for Products (2003)
Facebook's EdgeRank for Shopping (2010)