An Access Control System is a security measure that regulates who can enter or use certain areas or resources. It ensures that only authorized individuals can access specific locations, such as buildings, rooms, or data. This system can include physical barriers like doors and locks, as well as digital components like passwords and biometric scanners. These systems are essential for protecting sensitive information and maintaining safety in various environments, from corporate offices to government facilities. By implementing an Access Control System, organizations can effectively manage permissions and monitor who is entering or leaving their premises, enhancing overall security.