Ключевые слова: abstract, background, book, bookshelf, bookstore, business, cellphone, college, computer, couch, dark, device, digital, e reader, ebook, education, electronic, email, ereader, front, information, internet, knowledge, learn, library, literature, man, media, night, online, pad, pc, people, person, poetry, portrait, publication, read, reader, screen, smart, software, studying, table, tablet, teaching, technology, textbook, university, young,