概述 60年代,人们使用光电机作为计算机的输入设备,由于纸带传输速度慢、易卡带、断带等缺陷,很快被淘汰了。70年代,由于微机的诞生和发展,人们广泛采用键盘作为计算机第一代外设输入设备,虽然键盘有其局限性,但目前仍在服役之中。80年代,为增加图形输入功能,人们采用鼠标器及跟踪球作为计算机第二代外设输入设备。但由于计算机处理速度成倍增加,主存 Overview 60 years, people use the photoelectric machine as the input device of the computer, due to the tape transfer speed is slow, easy cassette, broken and other defects, and soon be eliminated. In the 1970s, due to the birth and development of the microcomputer, people widely used the keyboard as the input device of the first generation of computer peripherals. Although the keyboard has its limitations, it is still in service. 80s, in order to increase the graphical input function, people use the mouse and trackball as the second generation of computer peripheral input device. However, due to the doubling of computer processing speed, the main memory