Ключевые слова: bend, blue, book, bookstore, communication medium, concept, data, dictionary, document, education, encyclopedia, half open, information, intelligence, knowledge, learn, learning, library, literacy, literary, literature, magazine, notebook, office, open, page, page turner, paper, publication, publications, reading, research, school, schooling, sentences, sheets, study, studying, text, textbook, turn, turn over, turning, unfolded, university, wisdom, words, writing,