A portable terminal device, which employs a display unit utilizing a holographic screen, a main housing, a holographic screen, and an optical system. The second insulating film has an opening so that the second interconnect is exposed in an area. If the previously-generated query block information record exists in the data structure, then query block information is established for the first inner query block in the first state based on the previously-generated query block information record. Another embodiment of the system can be used for protection from glare of welding iron in a machine shop. Such a switching device therefore has a longer service life than conventional switching devices. If the multiple copies of the respective JAR file are determined to be inconsistent, the system alerts the user andor enables the application to abort.