当前人类社会已进入信息化时代,在信息社会中,信息成为比物质和能源更为重要的资源。以计算机、微电子和通信技术为主的信息技术革命是社会信息化的动力源泉。由于信息技术在资料生产、科研教育、医疗保健、企业和政府管理以及家庭中的广泛应用,从根本上改变了人们的生活方式、行为方式和价值观念。而电子文件的大量出现也改变 At present, human society has entered an era of informationization. In the information society, information has become a more important resource than material and energy resources. The revolution of information technology dominated by computers, microelectronics and communications technology is the source of power for social informatization. Because of the widespread use of information technology in data production, research and education, healthcare, business and government management, and at home, people’s lifestyles, behaviors and values ​​have fundamentally changed. The massive appearance of electronic documents has also changed