Ключевые слова: advice, advisory, alarm, alert, attention, beware, careful, caution, danger, dangerous, design, electricity, error, excitement, exclamation, fatal, flat, graphic, hazard, icon, illustration, important, industry, information, internet, mark, message, point, precaution, pressure, problem, risk, road, safety, secure, security, sign, signal, simple, symbol, traffic, warn,