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In the areas of information security and physical safety, access control refers to the physical restrictive access of a certain entity or resource, while access control generally refers to the procedure involved in controlling access to a location or resource. The term of access control can include the use of security personnel to monitor access to a facility, the authorization of personnel to enter a certain area, or the use of technology to track and supervise employees. The use of authorization is sometimes used to describe procedures such as authorization for a door lock, but in most cases it refers to the physical control of an object or individual. Access control system can also be used in conjunction with physical security to prevent access to restricted areas or to ensure that only authorized personnel are allowed into a given area.