A queue number acquiring unit acquires a command queuing number that is the upper limit of the number of process-waiting instructions that can be stored in each of storages that make up a virtual disk for each storage. The base station apparatus includes an orthogonal frequency division multiplexed encoder and a time division multiplexer. The hinge is able to provide a great degree of freedom of movement for the components because of the use of a hook member in the hinge. Owing to this, after various types of preprocessing are performed, the second OS is booted by using the boot image file loaded into the main storage unit. A preferred method of practicing the invention is to measure the change in iodide ion with an ion selective electrode and an appropriate electronic meter. The technique also includes obtaining execution frequency information by using the modified CFG.