The Area feature also allows us to know who and how many people are inside an area.   We can apply Anti-Passback rules to restrict a card at an Entry or Exit reader based on the status (IN/OUT) of the cardholder.   Readers from different controllers can provide access to a defined Area.   Areas and Supervisor levels allow us to determine that specific users (supervisor) must be present before any other cardholders can use their cards.   We can limit the number of cards per area by disabling access and/or activating a relay when Area is full.