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一.公共信息网络的发展 信息的应用是社会文明程度的象征。电子和通信技术的发展已使人们通过电视和电话获取信息成为可能。计算机及其网络的出现和迅速发展使以联机网络方式获取信息和信息交流为特征的社会信息化成为现实。 联机信息服务即用户通过网络对信息资源实现按需获取信息和信息交流的方式。其中最典型的是用户终端。目前国际上常见的形式有: ·商业性信息服务。以信息产品的商业销售为核心业务。典犁的网络有CompuServe、
I. The development of public information network The application of information is a symbol of the degree of social civilization. The development of electronic and communication technologies has made it possible for people to access information via television and telephone. The advent and rapid development of computers and their networks have made it possible to bring about the socialization of information characterized by the exchange of information and information online. Online information service means that users can get information and information exchange on the basis of information resources through the network. One of the most typical is the user terminal. At present, the common international forms are: Commercial information services. To the commercial sales of information products as the core business. The plow’s network has CompuServe,