All visitors sign in and out in a log indicating the time of day, whom they represent, and whom they are visiting. Visitors are issued badges and are required to wear them in plain view while on the premises. Access to the data processing area is restricted to authorized management and operating personnel. Access is controlled by doors activated with magnetic card readers attached online to a separate computer security system. Codes in the magnetic cards issued to each authorized employee designate which doors are available for access. A log is maintained of the card number and all access attempts. Access to the data center is restricted to the operations staff and equipment vendors only. A building security guard is on duty at all times.