进入90年代以来,从平台为中心的计算转向以网络为中心的计算成为信息技术的发展趋势,与网络相关的关键技术正在不断地得到发展和完善。最明显的表现是国际互联网、企业内部互联网的爆炸性增长。网络技术的不断发展和应用,使美国的商业正在发生根本性的转变,反应时间成为竞争的基础。例如许多零售业公司通过计算机信息网络实现定货、销售等各种信息的共享,并通过网络实现各部门之间的互相协作,各部门根据各 Since the 1990s, the shift from platform-centric computing to network-centric computing has become a trend of information technology. The key technologies related to the Internet are constantly being developed and improved. The most obvious manifestation is the explosive growth of the Internet on the Internet in the enterprise. The continuous development and application of network technology has led to fundamental changes in the U.S. commerce and the reaction time has become the basis of competition. For example, many retail companies through the computer information network to achieve ordering, sales and other information sharing, and through the network to achieve collaboration between various departments, each department according to each