Ключевые слова: background, blank, book, books, bookstore, business, college, colorful, copy, cover, device, digital, display, e, ebook, education, electronic, equipment, ereader, gadget, grey, hard, information, knowledge, learning, library, light, literature, mock, mockup, modern, object, old, paper, portable, read, reader, research, school, screen, space, stack, study, table, tablet, technology, text, textbook, university, up,