一、我们所处的网络环境 从世界范围来看,Internet是目前世界上影响最大、用户最多、信息资源最丰富的跨越全球的计算机信息通信网络。据不完全统计,这个网络已拥有150个国家的5万多个注册网络,500万台计算机,2500个数据库,而且计算机和数据库还以每年高于20％的速度激增。为此,无论是政府还是社团,纷纷制定网络计划。 美国总统克林顿在《国情咨文》中提出,要在2000年向所有的学校,医院和图书馆开通“信息高速公路”。目前,美国已有三分之二的图书馆与Internet相联。 1995年2月25至26日,欧洲联盟在布鲁 First, the network environment we are in From the world point of view, the Internet is currently the world’s most influential, most users, the most abundant information resources across the world of computer information and communication networks. According to incomplete statistics, the network already has more than 50,000 registered networks, 500 million computers and 2,500 databases in 150 countries, and the number of computers and databases has risen by more than 20% annually. To this end, both the government and community, have developed a network plan. In his “State of the Union Address”, U.S. President Clinton proposed to launch the “Information Superhighway” to all schools, hospitals and libraries by the year 2000. Currently, two-thirds of U.S. libraries are connected to the Internet. From 25 to 26 February 1995, the European Union is in Buru