A vehicle seat for an operator is disclosed in combination with a mechanical joystick for operating ancillary equipment of the vehicle. The selected acoustic units are chosen to minimize a combination of target and concatenation costs for a given sentence. The properties of the interconnection network are preserved during each recursion to thereby configure the massive switching fabric from scalable circuitry. A foot attached to a button in the base of the device urges the door out of position upon depression or activation of the button. The bottom part is pivotally attached to the top part so as to pivot relative thereto.