Which retail innovation, introduced in the 1990s, revolutionized book discovery and purchasing patterns by using collaborative filtering algorithms to provide personalized recommendations to readers?

The publishing industry has evolved dramatically in how books are marketed and sold to readers. From traditional bookstores to algorithm-driven recommendations, the journey of connecting readers with books has transformed through innovative retail strategies. This poll tests your knowledge about a pivotal moment in book retail history that changed how we discover and purchase literature.

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Amazon's 'Customers Who Bought This Item Also Bought' feature
Barnes & Noble's 'Discover Great New Writers' program
Borders' 'Personal Book Shopper' service
The New York Times' 'BookSense' recommendation engine