一个国家要面对新技术革命的挑战,攀登世界科学高峰,必须借鉴最新科技成就。面对不断向人们涌来的科技情报的汪洋大海,人们往往陷于找不到,读不完的困境之中,利用计算机进行情报存贮和检索的开拓性研究也就应运而生了。联机检索是通过与计算机相连的终端设备检索计算机中存贮的情报资料。大型计算机情报检索系统中存在许多数据库,每一个数据库都是一定专业领域的情报的集合。通过包括卫星通信在内的各种现代化通讯手段的应用,逐步形成了世界范围内的国际联机检索系统。目前,人们可以在世界上的任何一个城市,通过计算机网络向上万公里以外的计算机检索中心的 In order to meet the challenge of the new technological revolution and climb the peak of the world science, a country must learn from the latest achievements in science and technology. Faced with the sea of ​​scientific and technological intelligence constantly flowing from people, people often find themselves in a dilemma that can not be found and can not be read. Pioneering research into the use of computers for information storage and retrieval has come into being as well. Online search is through the computer connected to the terminal device to retrieve computer information stored in the intelligence. There are many databases in the computerized information retrieval system, each of which is a collection of information in a certain field of specialization. Through the application of various modern means of communication including satellite communications, a worldwide online international search system has been gradually formed. At present, people can search the center of a computer beyond thousands of kilometers through a computer network in any city in the world