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信息、材料、能源被称为现代社会的三大支柱。作为信息处理的最重要工具—数字电子计算机自四十年代发明以来获得了极快的发展。目前,全世界每年生产的微型计算机已按百万台计。计算机的运算速度可高达每秒数亿次,其输入、输出方式也逐渐多样化。声音的输入和输出,以及编码图形的输入和识别等装置亦已进入市场。人们用计算机终端通过调制解调装置和现有的电话、微波传输等通讯手段,坐在家中就可方便地利用千里之外的中心计算机的硬件、软件资
Information, materials and energy are the three pillars of modern society. As the most important tool for information processing - digital electronic computers have enjoyed tremendous growth since their invention in the 1940s. At present, the number of microcomputers produced annually in the world is on the order of millions. Computer computing speed up to hundreds of millions of times per second, its input and output are gradually diversified. Audio input and output, as well as the coding of the input and identification devices have also entered the market. People use computer terminals through the modem device and the existing telephone, microwave transmission and other means of communication, sitting at home can easily use thousands of miles away from the center of the computer hardware and software