Ключевые слова: around, away, background, big, blue, camera, cctv, circuit, color, concepts, control, danger, dawn, electrical, electronic, electronics, equipment, guard, image, industry, isolated, lens, look, monitoring, nobody, optical, outdoors, privacy, private, protection, record, safety, secrecy, secure, security, sign, silhouette, sky, sun, sunset, surveillance, system, technology, television, urban, video, view, wall, watching, white,