Abstract
The RoomComputer is an embedded system and as such offers unprecedented chances to manage buildings. Several RoomComputers can be networked via the intra-/Internet, which makes it possible to monitor, control, and manage rooms and buildings on a unified worldwide accessible platform, irrespective of any particular local technology. It can be easily installed in any building and gives access to a full set of services. It implements a distributed system, which provides secure and controlled access to services like: control of lighting, heating, ventilation, air and climate; communication facilities like unified messaging, telephone, fax, etc.; reservation of rooms and required resources; localization of persons and equipment within rooms and buildings; entrance control (i.e. locking/unlocking doors); organization of maintenance and house-keeping, and charging and billing.