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计算机输入设备的任务是将原始数据、指令等输入到机器中去,而计算结果或中间结果也必须由输出设备输送出来。由于计算技术的飞速发展,对计算机的运算速度及功能的要求也不断提高,因此相应地对其输入输出设备的快速性、可靠性、多样性等要求也越来越高。这里只介绍计算机的通用外部设备,如光电输入机、打印输出机等,至于专用机的专用设备就不属于此列了。通用外部设备的种类也是十分繁多的,随着计算机在国民经济各个领
The task of a computer input device is to input raw data, instructions, etc. into the machine, and the result of calculations or intermediate results must also be delivered by the output device. Due to the rapid development of computing technology, the requirements for the computing speed and functions of computers are also constantly increasing. Therefore, the requirements for the speed, reliability and diversity of input and output devices are correspondingly higher and higher. Here only describes the computer’s common external devices, such as optical input machine, printer and so on, as for the dedicated machine’s special equipment does not belong to this column. Universal types of external devices is also very diverse, with the computer in the various sectors of the national economy