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自1985年Philips和Sony公司公布了在CD光盘上记录计算机数据的CD-ROM标准以来,以CD-ROM光盘为载体的各种电子岀版物在世界范围内得到了迅猛发展。CD-ROM不仅适于大数据量信息的存储,而且还能够同时存储文字、声音、图形、动画、视频图象等多种媒体的信息,从而使传统的信息存储、传输、管理和使用方式发生了根本性的变化。目前有价值的信息资源,特別是需要长期保存的重要信息资源几乎全部采用CD-ROM或CD-R光盘进行存储、传输和交换,因此众多的图书馆、学校、档案馆、医院、岀版社、新闻机构、证券交易所、保险公司、银行、政府机关和军事部门都提岀了在网络上共享CD-ROM光盘资源的迫切要求,以便人们能够通过网络来获取CD-
Since the Philips and Sony companies released the CD-ROM standard for recording computer data on CD-ROMs in 1985, various electronic versions of CD-ROMs have gained worldwide popularity. CD-ROM is not only suitable for the storage of large amount of data, but also can store the information of a variety of media such as text, sound, graphics, animation, video and image at the same time, so that the traditional information storage, transmission, management and usage occur The fundamental change. At present, valuable information resources, especially important information resources that need to be preserved for long time, are stored, transmitted and exchanged on CD-ROM or CD-R discs. Therefore, a large number of libraries, schools, archives, hospitals, News agencies, stock exchanges, insurance companies, banks, government agencies and the military all raised the urgent need to share CD-ROM resources on the network so that people can access CD-