Barnes & Noble Inc. is one of the largest booksellers as well as content, commerce and technology companies in the United States. The company operates more than 1,000 stores in 50 states and 637 bookstores on college campuses. It operates its stores primarily under the Barnes & Noble Booksellers trade name. Barnes & Noble Inc. is mainly involved in the sale of trade books, such as hardcover and paperback consumer titles, mass market paperbacks, children's books, ebooks and other digital content.