Which AI recommendation algorithm, first implemented by Amazon in the late 1990s, revolutionized online retail by introducing item-to-item collaborative filtering?

The integration of artificial intelligence into retail has transformed how customers shop and how businesses operate. One breakthrough technology in particular revolutionized product recommendations and personalization. Test your knowledge about this pivotal innovation that changed the face of modern retail and created the foundation for today's sophisticated recommendation systems.

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Neural Network Prediction System
Amazon Personalization Engine
Customer Behavior Analysis Protocol
Dynamic Preference Learning Algorithm