Disk cassette storing

A storage cabinet for storing in each of a number of stacked storage regions a boxed compact disk, a boxed compact cassette or a pair of unboxed compact cassettes includes a pair of opposed parallel side walls cantilevered from a rear wall and having stacked opposed pairs of protrusions defining a first storage region extending between the side walls for receiving a boxed compact disk or a pair of unboxed cassettes and each having a shelf spaced from the rear wall for defining a second storage region of width corresponding to that of a boxed compact cassette and depth less than the width of a boxed compact cassette for storing a boxed compact cassette so that it protrudes slightly beyond the free ends of the side walls.