A building management system is a computer system designed to keep track of, and control, the various systems in a building.
Heat, air conditioning, and air circulation, are provided to the various parts of the building.
Door monitoring and access, intrusion sensor monitoring, and alarms within the various parts of the building are included.
This amounts to getting the water to the various floors within the building.
Control, surveillance, and access to the cars in the building are included.
This provides automated activation/deactivation and power conservation of the many fixtures in the building.