Ключевые слова: abstract, alert, alertness, attention, background, bankruptcy, blue, caution, color image, communication, computer, computer graphic, concept, cyber, cyberspace, danger, dark, datum, digital, digitally generated image, error, glowing, hazard, horizontal, illustration, information, issue, message, network, no people, notification, problem, protection, red, risk, safety, security, sign, signal, symbol, system, technology, threat, triangle, urgency, warning, warning sign, warning symbol,