OPTICAL RECORDING MEDIUM, ITS ADAPTER AND ITS DRIVING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a very small optical recording medium having excellent convenience in carrying. SOLUTION: A CD card adapter 10 has a shape with a partial lack in a disk and the lack part is a CD card mounting part 13. A CD card 1 is mounted on the CD card mounting part 13 of the CD card adapter 10. The CD card 1 is provided with a read only area for optically reading recording contents and a write once area for optical recording. When the CD card 1 is mounted on the CD card adapter 10, the CD card adapter 10 and the CD card 1 integrally constitute one disk so as to be driven like a normal disk shape optical recording medium.