A computer system that accesses multi-transport devices and associates device instances of the multi-transport device with each other. A gate electrode, insulating layer, semiconductor layer, doped silicon layer and metal layer are formed on a substrate. A hole is formed in the second colored layer so as to make color reproducibility of the second colored layer lower than color reproducibility of the first colored layer. One or more electrodes are located relative to the target material and the inlet, and are electrically charged, so as to cause at least some of the charged particles to impact upon the target material.