An email address may be associated with more than one inbox on more than one server. Thereby, even an extremely thin SOI layer having a thickness of 200 nm or less, can provide an SOI wafer that has an excellent electric property without micro pits caused by acid cleaning, and can be produced without increasing the number of processes. In a still further aspect of the present invention, information displays may be sorted by accounting for the differences in times and dates introduced through time stamping of events in different time zones. The apparatus may be used in a number of medical and other applications, including tissue resection, tracking movement of a medical device in a body cavity and tracking movement of an internal organ.