1. An information processing apparatus, comprising: display control means for superposing and displaying a plurality of selection item display elements indicative of a plurality of selection items respectively on a display unit, said selection items corresponding to a plurality of data and respective logical storage locations for the plurality of data, and displaying a plurality of item contents display elements indicative of the contents of the selection items on the display unit such that the contents can be visually confirmed, wherein the display control means displays the plurality of selection item display elements on the display unit in the form of an open book with the plurality of selection item display elements corresponding to individual pages of the open book; and operation means for carrying out a predetermined operation for the superposed and displayed plural selection item display elements; wherein the display control means shifts a display of a selection item display element among the superposed and displayed plural selection item display elements, based on the predetermined operation by the operation means, in the form of shifting a position of a page in the open book, wherein the plurality of item contents display elements are displayed in a separate region of the display unit from the plurality of selection item display elements, and are displayed within the separate region in a horizontally spread manner such that a horizontal position of each item contents display element is the same as a horizontal position of its respective selection item display element on the display unit such that each displayed item contents display element is displayed in a one-to-one correspondence with the displayed selection item display element for which it indicates the contents thereof.