Ключевые слова: background, blue, business, businessman, button, circuit, click, computer, concept, control, digital, display, energy, finger, hand, icon, idea, interface, internet, light, man, modern, multimedia, off, on, point, power, press, push, screen, select, shutdown, sign, start, stop, suit, switch, symbol, system, technology, tone, touch, touchscreen, turn, user,