Abstract: A system for receiving positional information and displaying a virtual world based on the positional information. The system includes a base and a chair that may be rotated with respect to the base by the user of the system. A monitor is attached to the chair so that it moves with the chair. A measuring device determines the rotational position of the chair. Joysticks are provided, and the bases of the joysticks are attached to the chair or the monitor so that they move with the chair. Data from the joysticks and from the rotational-position measuring device are sent to a processor, which accesses a data base defining a virtual world and generates an image on the monitor. The monitor image represents apparent movement within and through the virtual world represented by the databases.