Which IoT technology has Barnes & Noble implemented in their concept stores to help customers discover books based on their browsing patterns?

The publishing and bookselling industry has been transformed by technology in recent years. Major bookstore chains and independent sellers alike have adopted various technological innovations to enhance the customer experience and remain competitive in the digital age. Test your knowledge about how IoT (Internet of Things) technology is reshaping the modern bookstore landscape and creating new ways for readers to discover and engage with literature.

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Smart shelves with RFID sensors that track which books customers pick up and provide personalized recommendations
Automated book-retrieval robots that follow customers and carry their selections
Voice-activated kiosks that recite book summaries when customers approach specific sections
Floor sensors that create heat maps of customer movement and automatically adjust lighting for popular book displays