In response to a print request from a host computer, a port for receiving print data is assigned to the host computer, the host computer is notified of a URI representing the port that serves as a destination of print data, and the port is associated with the URI in a port-status management table. By doing that, a fine circuit pattern can be easily formed. The mounting platform includes a first and second coupling structure. Both pedals alternatively swinging up and down with the lever as the axis allowing a wider swing angle for both pedals to effectively reduce the height of the base subject to force. Position data, chemical compositional data and topographical data are transmitted along individual feeds to a data analysis component where they are analyzed and combined in order to generate a composite image.