Ключевые слова: 911, accident, advertising, aid, alarm, ambulance, arrow, background, button, call, closeup, communication, computer, concept, connection, crime, dialing, electronics, emergency, enter, fire, help, hospital, icon, information, internet, keyboard, line, medical, modern, network, notebook, number, police, red, safety, services, sign, sos, symbol, tag, technology, urgency, urgent, website, word, workplace, yellow,