Ключевые слова: abstract, alarm, alert, alertness, attention, background, business, button, communication, computer, concept, conceptual, control, cooperation, danger, dangerous, education, error, exclamation, grey, guidance, hardware, hazard, icon, idea, insurance, internet, key, keyboard, keypad, laptop, mark, mistake, network, notebook, order, problem, red, risk, security, sign, solution, sos, stop, symbol, technology, toned, warning, web, white,