An oil holding tank is communicated to the case of the compressor. The system includes a central computer, a display monitor, a card reader and an input device. The server performs image analysis on the uploaded images and obtains automatic image information. The vacancy concentration is reduced by an interstitial element or a vacancy-trapping element in the first source and drain regions. Communications between switching modules are accomplished by allocating wavelengths in the optical link to transmitting and selectively receiving the communications on the allocated wavelengths. The determination unit determines whether information on use of tab sheets is included in a printing job received from an information processing apparatus.