Which AI-powered retail innovation was first successfully implemented at scale, revolutionizing the industry?

The retail landscape has been dramatically transformed by artificial intelligence in recent years. From inventory management to personalized shopping experiences, AI technologies have revolutionized how retailers operate and serve customers. This trivia question explores a significant milestone in retail AI development that changed the industry forever. Test your knowledge about the evolution of artificial intelligence in the retail sector!

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Amazon Go's 'Just Walk Out' cashierless store technology (2018)
Walmart's automated inventory management robots (2017)
Amazon's product recommendation engine (1998)
Target's dynamic pricing algorithm (2009)