The anesthetist-computer interface tends to be a problem for the utilization of computer systems for anesthesia. Ergonomic interface design with an emphasis on the coherency of the interface's static and dynamic structure may improve this situation. To investigate this proposition we developed an Anesthesia Information System (AIS) with a touch-sensitive monitor as the hardware-user interface. Basic data input and system control techniques were defined and implemented. Record keeping is integrated into the user interface. Ventilator control from the same interface is an additional feature for laboratory simulations. The system is being evaluated using a technique that simulates live operations. References Anthony J (1982) BAS - A