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数据通信是继电报、电话之后出现的一种新的通信方式。它的最基本特征是将计算机和通信技术结合在一起。从五十年代后期美、日等国率先把数据通信应用于防空、铁路系统,至今才三十年的历史,但它的发展速度是十分惊人的。目前数据通信已应用于国防、生产、交通、金融以及行政管理等各个领域。随着计算机的日益普及,数据通信已成为一种很重
Data communication is a new communication method that appears after telegraph and telephone. Its most basic feature is the combination of computer and communications technology. From the late 1950s, the United States, Japan and other countries took the lead in applying data communications to the air defense and railway systems, and have only 30 years of history. However, its pace of development is very alarming. At present, data communications have been applied in various fields such as defense, production, transportation, finance and administration. With the increasing popularity of computers, data communications has become a heavyweight