提供位置座标的一种输入设备。例如鼠标器、图形输入板。 An input device that provides coordinates of a position.Example: A mouse, a tablet.
用鼠标器(或其它选图设备)检取显示在屏幕上需要的信息,以供计算机做下一步的处理。 Identification of information displayed on a screen for subsequent computer processing, by pointing to it with a mouse.