In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecordederased state and a recorded state, respectively. A polymeric protection switch is provided between a connector to which a coaxial cable connected to the antenna controller be connected and the tuner circuit. A max-min search circuit determines maximum and minimum turning points closest to the center of the data processing window and that are located on opposing sides of the window, to determine values and locations of maximum and minimum pixels of the edge. The component represents an implementable function in the electronic circuit. When the viewing area with the first size displays all of the information, the response includes: maintaining display of the soft keyboard, keeping the viewing area at the first size, and moving the information in the viewing area based on the finger gesture.