| 摘要 |
<p>An optical disc which serves both as a program disc and as a data disc by utilizing the fact that an optically recording/reproducing disc (1) has a very large capacity. Namely, onto a predetermined region (5) of the disc non-rewritably recorded in advance are a software program necessary for processing the data recorded in the optical disc (1) or the basic data necessary for executing the program, as well as an erasing program for executing the erasing operation for the recording region. Even in case the software programe and the basic data for executing the program are copied without authorization, the copy disc is prevented from being used.</p> |
