The purpose of the present invention is to provide a cushion structure for a vehicle seat, the cushion structure allowing the hardness of the cushion to be adjusted according to an occupant’s preference by simple operation. The vehicle interface may include a noise compensation configured to facilitate compensating for noise within the reference signal resulting from the reference circuit. The memory cell architecture also allows for improved high density memory devices or arrays with the utilization of reduced feature word lines and vertical select gates. The function unit receives the packet containing the first identifier from the transmission unit, and executes a predetermined processing for the packet. A first indicia portion is located at the first end. Therefore, the computer system can accept character entry from the handwriting recognition mechanism while the virtual keyboard is displayed and active and capable of providing character entry itself.