中国科学院上海文献情报中心加快了电子信息的建设 ,到目前为止电子信息容量已达 6 5 0 G,电子信息的内容有索引、文摘、电子期刊全文和电子图书等。电子信息品种达数十种 ,并以外文数据库居多。在对电子信息资源进行选择时 ,全面考虑、考察了各种因素 ,如电子资源收录的内容全 The Shanghai Documentation Information Center of the Chinese Academy of Sciences accelerated the construction of electronic information. Up to now, the electronic information has reached 650 GW. The content of electronic information includes index, digest, full-text e-journal and e-book. Dozens of varieties of electronic information, and mostly foreign language databases. In the choice of electronic information resources, comprehensive consideration and examination of various factors, such as the content of electronic resources included