输入设备包括键盘和点击设备如鼠标，操纵杆，跟踪球或光笔。
Input devices include keyboards and pointing devices such as mouse joystick track ball or light pen.
将鼠标器或跟踪球放在键盘旁。
指示装置包括鼠标、跟踪球、操纵杆、光笔、数字化书写板等等。
Pointing devices include mice, trackballs, joysticks, light pens, digitizing tablets, and so on.
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