The Scientific Databases of the Chinese Academy of Sciences(SDBCAS) is a group of the scientific and technological databases which covers the broadest range of the displines in China.At present,SDBCAS offers the largest-volume,comprehensive and highly integrated information on a variety of databases. In this paper,a brief introduction of the construction,application and services of SDBCAS is given.Some tentative ideas about its further development is presented also.

The National Scientific and Technical lnformation Network (STINet) has reached a certain size after two year development, But the developing speed is reduced due to the over-high telecommunication cost. So the State Science and Technology Committee of China (SSTCC) has decided to set up the VSAT backbone network which will provide STINet with a communication platform to reduce the telecommunication cost and provide a unified transferring platform for other systems and networks of SSTCC. The article introduces and analyses the current situation of STINet, the possibility and the structur of the above project, the VAST network of  SSTCC.

This paper describes the goal of developing Homepages for the library,key technology in the design,and procedures of developing Homepages. The Shanghai Jiao Tong University Library Homepage examples and experience are provided.

The Internet is the largest global information network at present.It greatly influences the development of the information industry. This paper discusses how to study,exploit and make use of the information resources on the Internet by using new technology and puts forward a method for automatic tracing on the resources Internet by using Search Engines.

In a few years,the Internet has grown exponentially and is becoming more popular. The condition for CD ROM based retrieval in WAN enviroment has matured.In this paper, We introduce a method to realize the CD ROM based retrieval on the CERNET WAN platform by use of Netware/IP.The advantages of the adopted solution is low cost and effectiveness.

After analyzing the problems in taking advantage of CD-ROM databases,the paper discusses and compares two sharing models:CD-ROM network and PPP retrieval system.At the same time,the paper suggests following the ideas:1.to creat a regional cooperative CD-ROM network.2.to make futher use of CD-ROM databases.

The article discusses the technologies and applications of digital libraries and introduces related issues in the light of the concrete practice of the Tsinghua University Library.

The paper introduces the model,devolpment and current status of automation and networking of libraries at Hong Kong universities and advanced information technologies used in these university libraries,which can serve as useful experience to university library modernization.

Existing Library Automation Systems in Chinese Libraries are primarily based on shared file server LANs or centralized host/terminal systems,Both approaches have some drawbacks to meeting the future requirements of the libraries.This paper addresses necessities for development of Client/Server based library automation systems.Issues in selection of hardware,operating systems,communication protocols,DBMS are discussed.Some of the methods of software development are also discussed.

In view of specific characteristics of Chinese morphology,the paper proposes an improved algorithm of single Chinese character Indexing.In the indexing Module,it rejects the Character that can not be the first character of a keyword;in the retrieval module,it matches the keyword directly.The algorithm stores theresults of retrieval and constructs the psot-controlled vocabulary.The algorithm was implemented in the SCIRS (Single Chinese Character Indexing and Retrieval System).

The influencing technical factors of the retrieval software and data storage format in data CD-ROMs are analyzed.Also the selection of data CD-ROMs is discussed based on our practical experience.