Ключевые слова: advertisement, alarm, alert, alertness, announcement, attention, background, blogging, bubble, business, caution, chat, color, colored, communication, connection, danger, design, discussion, error, exclamation, global, image, label, labeling, mark, media, message, messaging, mistake, notification, online, point, problems, risk, safety, security, sharing, sign, social, speech, speech bubble, stop, symbol, talking, urgency, warning,