The present invention is directed to a computer in which an optional unit such as a unit including a wireless LAN adapter is installable. More particularly, the integrated circuit is divided into cells, and one or more nodes are identified within each of the cells. The plasma display panel further has a transparent electrode layer that is at least partially formed between the glass substrate of the back plate and the data electrodes. The image forming apparatus further transmits image data of the document image to the information processing apparatus via the network, and resets the press-down information. The data receiving device may be a characteristic monitor, a data receiver that provides data to another device, an RF programmer for a medical device, a medication delivery device, or the like.