Which retail innovation did Barnes & Noble first introduce in 2009 that transformed how customers discover books in physical stores?

The publishing and bookselling industry has undergone remarkable technological transformations in recent years. From AR-enhanced browsing to innovative store layouts, bookstores are reimagining the literary shopping experience. This poll tests your knowledge about a groundbreaking retail innovation that changed how readers discover and interact with books in physical stores. Can you identify the technology that revolutionized the modern bookstore experience?

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Discovery Table digital touchscreens that let shoppers browse the complete catalog
The NOOK in-store kiosks allowing customers to preview e-books before purchase
BookMatch facial recognition software that suggests titles based on emotional reactions
LitScan shelf technology that sends book information to smartphones when pointed at spines