For machine procedure simulation, a synchronization module stores a plurality of equipment procedures in a procedure database. The advertisement could be print advertisement or broadcast advertisement on television or radio. The memory elements each have a respective second electrode coupled thereto which in cooperation with the bit line access transistors and first electrode, serves to apply read, write and erase signals to the memory element. When the document cover is in the closed position, pressing parts press the center part of the pressing plate against the document bed. The invention further provides a method of chemically-mechanically polishing a substrate with the polishing system. A transparent conductor to be applied on top of the n-type layer will form the second electrode.