Ключевые слова: alertness, bodyguard, building, business, control, defense, guard, guardian, mall, metal, mobile, monitor, monitoring, observation, outdoors, overview, patrol, police, policeman, portable, prevention, private, profession, property, protection, provisory, raised, safe, safeguard, safety, secure, security, security tower, sentry, separate, service, staff, station, structure, supervise, supervision, surveillance, system, temp, temporary, tower, watch, watchtower, white, workplace,