Abstract: A flexible information storage disc includes a central mounting portion and an outer body portion providing a surface area on which information may be recorded. The central mounting portion is provided with a least first and second apertures disposed radially outwardly with respect to the geometric center of the disc. The first and second apertures are respectively arcuately elongated in directions conforming to rotation of the disc about its geometric center. The leading end of the first aperture is defined by a pair of straight edges angularly intersecting at an apex and the leading end of the second aperture is defined by a single straight edge.