Credit card-type data medium adapted for cd-rom player or the like

摘要

A data medium whereon are recorded data readable in a CD-ROM player which includes a support for receiving CD-ROM discs with a diameter of 12 cm and a recessed site for discs of 8 cm. The data medium has the format of a credit card and includes positioning or centering means for the player to be able to read in the same way as a CD-ROM disc. The positioning and centering means include two projecting portions such as stripes or a single-piece arc-shaped part designed to be urged into contact with the inner circular rim of the hollow site for the discs with a diameter of 8 cm.