Pervasive output capability is provided so that an information apparatus can pervasively output digital content to an output device regardless of the processing power, display screen size and memory space of the information apparatus. The electromagnetic coupling apparatus includes a multiplate brake mechanism, a ringlike core member fixed in the housing, an annular exciting coil accommodated in an annular groove of the core member, and a ringlike armature member opposed to the annular groove of the core member. or lower is introduced to the carbon monoxide removal reactor. The durable storage stores the state of data associated with the start state of the step and the completion state of the step and are accessible by other execution processes as associated with either the start state of the step or the completion state of the step.