连接到处理计算机，用以实现通讯、数据存储、打印等辅助功能的设备。
Peripheral Equipment - Devices connected to a computer processor, which perform such auxiliary functions as communications, data storage, printing, etc.
辅助设备(指键盘)检查时钟线，如果时低电平，禁止发送数据。
The auxiliary device checks the 'clock' line. If the line is inactive, output from the device is not allowed.
你可以在辅助存储设备上存储数据，例如直接存取存储设备或者磁带。
You can store data on secondary storage devices, such as a direct access storage device or magnetic tape volume.
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