Ключевые слова: alarm, antennas, big, blue, brother, cable, camera, circuit, clouds, control, crime, danger, defense, detection, electronics, entrance, equipment, fear, fence, guard, industry, inspect, lens, mast, monitoring, object, observer, outdoor, oversight, precaution, protection, safety, security, sky, spy, surprise, surveillance, survey, system, technology, view, viewer, warning, watch, watchfulness, witness,