日本国际电报电话公司(KDD)和索尼公司从1983年起,就合作开发磁性光盘存储器,并且已于最近正式作为外存装置投入使用。该装置用在国际分组交换数据传输系统(VENUSP)中存储来往数据,成为进入商业应用阶段的第一个磁性光盘存储器。迄今为止,传输数据都是存储在磁带或是磁盘上的。然而这些媒介存在着各种缺陷,例 Since 1983, Japan’s International Telegraph and Telephone Corporation (KDD) and Sony Corporation have been working together on the development of magneto-optical disk storage and have recently become commercially available as external storage devices. The device used to store the incoming and outgoing data in the international packet switched data transmission system (VENUSP) became the first magnetic optical disk memory to enter the commercial application stage. So far, the transfer of data is stored on tape or disk. However, there are various defects in these media, for example