输入设备和输出设备是数据处理系统的关键设备之一。输入设备的任务是把数据、指令及某些标志信息等输送到计算机中去,而输出设备则把计算或处理的结果或中间结果以人能识别的各种形式,如数字、符号、字母等表示出来,因此输入输出设备起了人与机器之间进行联系的作用。 Input devices and output devices are one of the key devices in data processing systems. The input device’s job is to send data, instructions, and certain markup information to the computer, while the output device takes the calculated or processed results or intermediate results in human-recognizable forms such as numbers, symbols, letters, etc. Expressed, so the input and output devices played a role in the link between people and machines.