文件名称：computer english
文件大小：3.64MB
文件格式：PDF
更新时间：2013-06-16 11:45:47
computer english
We can define a computer as a device that accepts input, processes data, stores data, and produces output. According to the mode of processing, computers are either analog or digital. They can be classified as mainframes, minicomputers, workstations, or microcomputers. All else (for example, the age of the machine) being equal, this categorization provides some indication of the computer’s speed, size, cost, and abilities.