一、近年来,由于现代社会经济管理与分工越来越复杂,对信息的采集、存储、加工、控制、传输自动化等要求也越来越迫切、并渗透到经济和社会的各个领域,对计算机及其配件的需求量极大,据日本机械出口联合合预测,日本、美国、英国、法国及西德五个工业发达国家未来的市场为:1990年计算机为1172美元,办公设备为103亿美元,通信机为541亿美元,CAD/CAM系统70亿美元;到2000年,上述市场均分别为2503、160、871及167亿美元。苏 I. In recent years, due to the increasingly complicated economic management and division of labor in the modern society, the requirements for the collection, storage, processing, control and transmission of information are also becoming more and more urgent and have penetrated into various fields of economy and society. According to Japan’s joint export forecast, Japan, the United States, Britain, France and West Germany five industrialized countries in the future market: the computer in 1990 was 1172 US dollars, office equipment was 10.3 billion US dollars , Communicators 54.1 billion US dollars, CAD / CAM system 7 billion US dollars; by 2000, the above markets were 2503,160,871 and 167 billion US dollars. Su