Ключевые слова: addition, alarm, camera, control, crime, danger, detection, detector, digital, electronic, equipment, guard, home, industry, installation, instruction, lens, modern, monitor, monitoring, motion, office, online, open, outside, prevention, privacy, private, property, protection, recording, safe, scheme, search, security, spy, surveillance, system, technology, television, video, video surveillance, vigilance, wall, warning, watch,