Ключевые слова: background, black, blackboard, blank, board, business, chalk, chalkboard, class, classroom, close, communication, computer, copy, device, digital, dirty, display, drawing, education, electronic, empty, gadget, green, grunge, hand, hold, internet, isolated, learning, man, media, message, mobile, old, people, phone, school, screen, showing, smart phone, space, tablet, technology, telephone, texture, touch, white, woman,