Access Control Systems are security measures that regulate who can enter or use a specific area or resource. These systems can include physical barriers like doors and gates, as well as digital methods such as passwords and biometric scans. Their primary goal is to protect sensitive information and ensure that only authorized individuals have access. These systems can be found in various settings, including offices, schools, and data centers. They often utilize technologies like keycards, security cameras, and alarm systems to monitor and control access. By implementing these measures, organizations can enhance security and reduce the risk of unauthorized entry.