进入90年代以来，以程控交换机、移动通信和光纤为主体的通信技术以及计算机、微电子技术的飞速发展，极大地推进了信息技术和信息产业的发展。随着经济和社会信息化程度的不断提高，信息产业不仅越来越成为国民经济新的增长点，而且带动了传统产业的升级换代，促进其它高新技 Since the 1990s, the rapid development of communication technology with computer-controlled switches, mobile communications and optical fibers as well as the rapid development of computers and microelectronics has greatly promoted the development of information technology and information industry. With the continuous improvement of economic and social informatization, the information industry has not only become a new growth point of the national economy, but also promoted the upgrading and replacement of traditional industries and promoted the development of other high-