八十年代后期以来,计算机界发生着根本性的变化。个人计算机和工作站的兴起,使计算环境从终端—主机式的集中模式变为客户—服务器的分布模式,从厂家产品导向的市场变成用户需求导向的市场。作为一个用户,所需要的究竟是什么呢?企业的领导考虑的是如何使企业具有竞争力; Since the late 1980s, fundamental changes have taken place in the computer industry. The rise of personal computers and workstations changed the computing environment from a terminal-host centralized mode to a client-server distributed mode from a manufacturer’s product-oriented market to a user-demand-oriented market. As a user, what exactly is needed? The leaders of the enterprise consider how to make the enterprise competitive;