High-strength steel sheet excellent in hole-expandability and ductility, characterized by; comprising, in mass %, C: not less than 0. A rotary shaft disposed in a housing is provided with a spiral spring, the measuring belt, and an optical modulating section having a part for regulating the quantity of transmitted light. The apparatus also includes a storage unit configured to store information for an illumination device located within a preset distance range from the at least one device. The command limiter further includes a magnitude limiter that limits the magnitude component to the maximum fundamental voltage component of the inverter, and a polar-to-Cartesian converter that converts the limited magnitude component and the phase component into modified d-q command voltages. The operation element is disposed at a substantially central position of a palm rest, which is provided on the upper face of the body forwardly of the keyboard, in the leftward and rightward directions of the body in the proximity of the touch pad or the left and right click buttons. The storage caching system is implemented by storage caches, which are associated with workstations, and a cache server, which is associated with a file server, where the storage caches and the cache server interface with a distributed file system to provide shared access to real time data files by remote workstations.