1950: The Turing Test Alan Turing, an English mathematician and logician, advocated the theory that eventually computers could be created that would be capable of human thought. To cut through the long philosophical debate about exactly how to define thinking he proposed the "imitation game" (1950), now known as Turing test. His test consisted of a person asking questions via keyboard to both a person and an intelligent machine within a fixed time frame. After a series of tests the computers success at "thinking" could be measured by its probability of being misidentified as the human subject. Still today Turing's papers on the subject are widely acknowledged as the foundation of research in artificial intelligence.

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Barnes and Noble Massive online retail bookstore housing more than a million titles. Includes a book recommendation "personalizer,", a comprehensive list of The New York Times bestsellers, a "live" community events calendar with a daily survey and several forums, "highlighted" books from 19 subject areas, browsable categories such as antiques, ethnic studies, and pop culture, Books in the News, and weekly features such as reviews, excerpts, recommendations, interviews, events, "roundups" of popular titles, and quizzes.

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