Ключевые слова: abstract, background, badge, banner, black, blackboard, blank, board, button, chalk, chalkboard, circle, click, close, closeup, computer, connect, control, design, electric, electrical, electricity, electronic, end, energy, equipment, frame, globe, green, hardware, icon, internet, key, keyboard, label, monitor, off, ok, online, pattern, pc, power, powerful, press, push, round, shutdown, sign, signal, start, stop, supply, switch, symbol, tag, technical, technology, texture, turning, web, website,