A portable computing device includes a touch screen with a display, and a controller that causes a keyboard image and first and second command graphics to be displayed. The first and second command graphics each contain a direction-specifying area for selecting a direction of movement of a cursor that is movable within the keyboard image and a selection input area. Touch position information concerning whether the direction-specifying area or the selection input area has been touched is generated by the controller. When the direction-specifying area of the first or second command graphic is touched, the corresponding cursor is moved in one or more discrete key image units in the direction of movement indicated by a portion of direction-specifying area that was touched; when the selection input area is touched, the character of the character key image that the cursor is currently superimposed upon is displayed on the character display field.