963 is a graphical, real-time, user interface for the building control system. It enables the user to monitor plant or building services, and make changes to the way the building is controlled from a graphical display. All pages and actions are accessible using a mouse. The security system ensures that the user is only presented with information and functions that are relevant to their authority or task. The 963 learns the structure of the system allowing the 963’s Device Viewer facility to provide system information without the need for engineering.