A semiconductor device capable of improving the accuracy determines whether a prescribed input potential is higher or lower than a reference potential. The conveyor has a number of drive members arranged along the path, and to which the pressure devices are connectable by universal transmission assemblies. The handle assembly may be provided with a lockout system that is configured to block connection of the source of pneumatic power to the portion of the handle assembly and the pneumatically powered drive system after the source of pneumatic power is disconnected from the portion of the handle assembly and the pneumatically powered drive system a predetermined number of times. A regression section regresses, to a linear formula, the color correlation between color signals in the uniform region. Threads within a processor are assigned the processing of various protocol functions in a parallelpipelined fashion.