means how your employees or members of your organization (or even be a home) gain access to the a building or faciity. In the past, keys were the only way to control who gained entry. Keys can be lost or duplicated, so take management of keys out of the equation. Today, other forms of access control can be employed such as access badges and biometric scanners. If an employee leaves the company, even if they don't return their access card, they can easily be deleted from the database - even remotely.