When a user enters control information for controlling a printing device, the information is stored in a user information storage unit. The first apparatus is coupled by its first end to a first end of the second apparatus so that a second end of the first apparatus located opposite the first end, and a second end of the second apparatus located opposite the first end are arranged at a distance to each other on a surface which is at a distance from the coupling of the first ends. The processors within the node are coupled to a memory bus operating according to a snoopy protocol.