Input devices on a computer can be categorized into three types: input peripherals, input controllers, and input sensors.

Input peripherals can be further categorized into two types: pointing devices and input devices. Pointing devices are used to move a cursor on the screen and include a mouse, trackball, and joystick. Other input devices include a keyboard, scanner, and digital camera.

Input controllers are devices that allow you to interact with a computer system. They include a keyboard, mouse, trackball, joystick, and touchpad.

Input sensors are devices that allow you to interact with a computer system by sensing your body movements. …