When the first time has elapsed after the operator operates a power switch to stop power supply, an image processing apparatus forcibly stops power supply. In another embodiment, a series of such simulators may be placed in a classroom together with a single large screen video monitor or television at the front of the class, so that multiple students can follow along with the video simulation under the supervision of a teacher or instructor. The type of information in metadata for one type of file differs from the type of information in metadata for another type of file. A pressure pad within the stripper die holds a workpiece in place for cutting.