Touchable panels are one of the most basic user interaction devices for embedded devices - keypads, sensors, and roller wheels also are included in many different devices for various purposes.

• 可触摸板是用于嵌入式设备的最基本的用户交互设备之一小键盘、传感器和滚动轮也包含在许多不同设备中以用于不同的用途。