Access systems are technologies and methods used to control who can enter or use a particular space or resource. These systems can include physical barriers like doors and gates, as well as electronic solutions such as keycards, biometric scanners, and security codes. Their primary purpose is to enhance security and ensure that only authorized individuals can gain access. In addition to physical security, access systems can also manage digital resources. For example, software applications often use access control to restrict user permissions based on roles. This helps protect sensitive information and ensures that only designated users can view or modify data.