The first mouse, a bulky device (pictured) used two potentiometers perpendicular to each other and connected to wheels: the rotation of each wheel translated into motion along one axis.
第一台鼠标是一种笨重的设备（如图所示），两个相互垂直的电位器被连接到轮子上，每个轮子的转动都会转化为沿着某个轴的运动。