Abstract: A control device for computers or industrial processes is provided. The device comprises one or more transducers arranged in a chair for sensing movements of the chair. A first transducer is arranged to sense turning movements of the chair and emit signals corresponding to movements in a horizontal direction. A second transducer is provided for sensing tilting movements of the chair and is arranged to emit signals corresponding to movements in a vertical direction. The output signals of the first and second transducers are supplied to an interface. The interface outputs signals to a transmitter which controls the computer or process, for example, a cursor on a display device.