Ключевые слова: accident, alarm, alert, attention, background, beware, black, button, careful, caution, concept, construction, danger, dangerous, design, error, exclamation, failure, forbidden, graphic, hazard, icon, illustration, industry, information, internet, isolated, label, mark, message, notice, problem, protection, red, risk, road, safety, secure, security, sign, signal, stop, symbol, traffic, triangle, warning, web, white, yellow,