Experience shows that, in a material containing oxygen as a main component, an excess or deficiency of trace amounts of oxygen with respect to a stoichiometric composition, or the like affects properties of the material. The input can include one or more characters in a first writing system. The contact portion is sandwiched by the upper and lower body parts. By the air flow from the air-cooling unit, the heat-radiating fins are caused to be a part of the ventilation path to allow for ventilation of the inside of the radiator. Further, the server selectively receives a modification message to modify the enhanced content data associated with the information from the access device.