An alarm system is a system designed to detect intrusion – unauthorized entry – into a building or other area. These systems are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders.

An alarm system is a system designed to detect intrusion – unauthorized entry – into a building or other area. These systems are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders. Alarm systems are designed to detect intrusion, which is the unauthorized entry of a person or vehicle into a building or other area. They are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders. Alarm systems can be used to protect individual homes, apartments, condominiums, businesses, and even entire cities. They can be used to protect people, property, and information.