Ключевые слова: 911, accident, alarm, alert, ambulance, assistance, background, blue, button, call, communication, concept, contact, danger, department, design, emergency, fire, first, flat, health, help, hospital, hotline, icon, illustration, isolated, medical, mobile, number, pattern, phone, police, red, rescue, safety, screen, seamless, security, service, sign, smartphone, sos, support, symbol, technology, telephone, warning, web,