前言 以数字化、网络化为主要特征的信息时代正快步走来,越来越多的机构,如:政府部门、学校、企业事业单位等已经或正在建立自己的计算机网络系统、计算机信息系统,逐步实现机构业务信息、业务数据的数字化、网络化。网络技术、Internet技术的进步以及人们对数字化信息共享、交流、处理的需要促使机构逐渐开放其信息系统并通过网络把它和其他机构的信息系统相连,形成一个全球化的数字化信息网络。在促进信息的 Introduction The era of information, characterized by digitalization and networking, is rapidly approaching. More and more agencies, such as government departments, schools, enterprises and institutions, have established or are establishing their own computer network systems, computer information systems, Gradually realize institutional business information, business data digitization and networking. The progress of internet technology and Internet technology as well as the need of people to share, exchange and process digital information urge agencies to gradually open up their information system and connect it with the information systems of other agencies through the Internet to form a globalized digital information network. In promoting information