This paper introduces the development of the networks structure,scale,application system and information resource of China Engineering Technology Information Networks,summarizing the characteristics and problems in its building,and describing its prospects.

The article introduces the development and implementation of Full text Information Retrieval Systems,discusses the principles and methods of constructing a Full text Information Retrieval System under the circumstance of Client/Server and Internet.Based on the above,the implementation technique of BDSIRS Full text Information Retrieval System is given in detail.

Based on the basic logics of hypertext retrieval and the coretechniques of Internet/WWW applications,this paper describes the design of the network based system mechanism,function module structure,and CGI programs of a web based tranferrable full hypertext driven bibliographic retrieval system,independent of specific data structures of system tools.This work also explores the ways and means of building such systems.

The article introduces the growth background and technical characters of Alta Vista,which is a powerful search engine to search information on the Internet.And it studies AltaVistas searching methods and skills.

The paper introduces several practical methods of copying information from Internet and gives some related concepts.

Ancient rare books are the documents for which there exists maximal contradiction between their usage and preservation while the best way is to digitize them.The fulltext data entering should keep the original appearance of the rare books.The Chinese Ancient Rare Books Image Retrieval System produced by the Shanghai Library can transfer the fulltext data into CD ROMs as images and the functions of the indexing,searching and browsing as well ,which serves as a good attempt to digitize the ancient rare books.

In this article the author introduces the development of the database of Beijing local documents and indexes to their newpapers and periodicals.

This paper describes Shanghai Library computer management system.It also introduces the structure of its computer system and network system,the feature and reliability of the system,and seven application subsystems.

The Documentution & Information Centre of the Chinese academy of Scienecs The Study takes a user-focused approach to analyzing data requirement. It uses an entity analysis technique to finding the key objects of interest to users of bibliographic records, and then identifies the characteristics or attributes and the relationships between entities. The aim of study was to produce a clearly defined, structured framework, and to recommend a basic level of functionality for records created by national bibliographic agencies.

This paper reviews the lilerature on automatic abstracting,introducts an automatic system of summarizing text by sen tence selection,details implications of its results,and points out that the method of summarizing text is still usefull for automatic condensation of text.