Abstract: The present invention relates to disc-shaped information-carrying media for storage and reproduction of audio-, video- and other types of information in a digital form. The disc-shaped information-carrying medium comprises at least a substrate with a matching bore in its central area for locking said medium in a reading device, said substrate having a first side and a second side opposite thereto, on at least said first side of said substrate a first information area is provided for information storage and/or recording and reading such information using a laser beam. According to a first embodiment said substrate thickness at least within said first information area does not exceed 0.8 mm, said substrate central area is provided with N>1 ending protrusions projecting over said substrate first side and facilitating locking said medium in a reading device drive.