#security system

• Alarm — A predefined acoustic, visual, or electronic signal emitted by a specialized device to warn of an imminent danger, an unauthorized intrusion, or a major emergency; by extension, a state of alert, profound anxiety, fear, or collective agitation caused among the population by the emergence of a threat. This structural mechanism includes both automated warning systems (fire, burglar alarms) and the psychological or operational reaction of immediate mobilization of intervention resources.
• Alerting — The act of alarming and its result; the voluntary or automatic transmission or triggering of an alert signal for the purpose of warning a community, military unit, or intervention team about the imminence of a danger; placing into a state of operational readiness. In a structural and technical sense, it represents the first stage within the emergency management protocol, immediately followed by the mobilization of logistical resources to limit the threat's effects.
• Air defense — The feminine form of the adjective 'antiaerian', or used as a noun to designate the entire complex of air defense forces, weaponry, artillery, and missile systems dedicated to protecting airspace against enemy aerial attacks.
• Anti-theft — Designed to prevent, block, or signal attempted theft, burglary, or illegal misappropriation of an asset (vehicle, home, luggage, or electronic device); a complex mechanical or electronic system destined for securing objects. As a noun, it designates any physical device fulfilling this protective function.
• Defense — The act of protecting against an attack, aggression, or danger and its result; a set of tactical, strategic measures or fortified structures designed to repel an enemy offensive. In the legal field, it represents the totality of arguments, evidence, and activities carried out by a lawyer to demonstrate an accused person's innocence, while in sports it defines a team's tactics or department responsible for preventing the opponent from scoring.