Which AI-powered retail technology was first widely adopted by major bookstore chains around 2018 to create personalized book recommendations based on browsing behavior?

The book retail industry has undergone significant technological transformation in recent years. Independent bookstores and major chains alike have adopted various retail technologies to enhance customer experience, personalize recommendations, and compete with online giants. This trivia question explores a notable AI implementation that changed how readers discover new books in physical stores. Test your knowledge about the intersection of literature, retail, and artificial intelligence!

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BookSense AI: Shelf-embedded sensors that track which books customers touch and examine
LitMatch: Facial recognition that identifies emotional reactions to book covers and suggests similar titles
Endcap Analytics: Computer vision systems that analyze customer engagement with featured displays
ReaderDNA: Fingerprint scanners that link physical browsing to online purchase history