Provided are a communication apparatus and program which improve the operability for a user before and during data communication. The memory device may utilize a WAIT_DQS signal that combines functionality of a WAIT signal indicating when valid data is present on a data bus in Read cycle and the memory is ready to accept data in Write cycle, and a data strobe signal. The second carburetor is adapted to attach to the engine and replace the carburetor. The frequency of the plasma waves, and as a result, the generated radiation are adjusted using a voltage applied to the semiconducting device.