Ключевые слова: book, business, cable, communication, computer, concept, connection, dictionary, document, ebook, ecommerce, education, electronic, equipment, group, heap, ideas, information, internet, isolated, knowledge, learn, library, literary, literature, mouse, network, object, online, order, paper, pile, publication, reading, research, school, search, shopping, stack, storage, study, studying, technology, textbook, web, white, wisdom, working, www,