What is the purpose of a Head-In System?

A Head-In System is primarily designed to secure physical access to locations, which is crucial for ensuring safety and controlling who can enter specific areas. This system typically uses various forms of identification or security measures to allow only authorized personnel to gain access to restricted areas, enhancing overall security in environments such as offices, storage facilities, or other sensitive locations.

The other options focus on different functionalities. For instance, managing online payment processing pertains to handling transactions, which involves systems meant for electronic payments rather than physical access. Monitoring product inventory levels would relate to inventory management systems designed to track stock quantities and movements, while installing software updates for terminals is specific to maintaining the operational efficiency of devices rather than managing access. Therefore, the identification of the Head-In System as a security measure aligns with its primary function.