Anti-theft systems are security measures designed to protect valuable items, such as cars, homes, and personal belongings, from theft. These systems can include alarms, locks, and tracking devices that alert owners or authorities when unauthorized access occurs. For example, a car alarm will sound if someone tries to break into a vehicle, while a home security system can notify homeowners of intruders. Many modern anti-theft systems also use technology like GPS tracking to help recover stolen items. If a smartphone is stolen, its built-in tracking feature can help locate it. Overall, these systems provide peace of mind by deterring thieves and enhancing security.