Ключевые слова: background, blank, book, cellphone, communication, communicator, computer, design, device, digital, display, ebook, electronic, element, empty, finger, flat, forefinger, gadget, hand, hold, horizontal, human, isolated, laptop, mobile, monitor, pc, pda, phone, reader, screen, shadow, showing, simple, smart, smartphone, tablet, telephone, touch, touchpad, touchscreen, using, vertically, white,