Ключевые слова: area, attention, background, black, cam, camera, caution, cctv, color, colorful, control, crime, danger, design, digital, equipment, graphic, guard, icon, illustration, isolated, looking, monitored, monitoring, observe, police, privacy, private, property, protection, safety, secure, security, set, sign, street, surveillance, symbol, system, technology, video, warning, watching, white, zone,