Answer:
Touch screen
Step-by-step explanation:
A computer system is an electronic device that is meant to give processed output values to input values. The computer components are categorized into three parts, namely input devices, output devices and processing unit.
Input device component of a computer are used to give commands or input data values to the computer. Examples of input devices are keyboards, mouse, joystick, light pen and most recently, touchscreens.
Touch screen are input devices on the screens on computer systems like laptops and smartphones, that uses light sensors to input data when the screen is touched with the finger or a stylus.