Ключевые слова: alertness, background, business, cameras, cctv, computer, control, crime, danger, device, digital, display, empty, evening, guard, guardian, indoors, modern, monitoring, monitors, night, nobody, occupation, office, online, prevention, privacy, private, profession, property, protection, room, safeguard, safety, screen, secure, security, service, supervision, surveillance, system, table, technology, telephone, television, video, watch, work, workplace,