Which analytics technology did Amazon first patent and implement at scale that revolutionized how retailers collect customer behavior data?

Amazon started as an online bookstore but has since transformed retail with technological innovations. This poll tests your knowledge about Amazon's scientific contributions to retail analytics and how they've changed the industry landscape. Do you know which groundbreaking technology Amazon pioneered that revolutionized retail data collection?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Just Walk Out technology (computer vision and sensor fusion for checkout-free shopping)
Dynamic pricing algorithms based on competitor monitoring
Voice-activated shopping through Alexa
Recommendation engine based on collaborative filtering