The touch screen monitor allows the user to operate the host computer simply by touching the icon or text on the computer display screen with his finger, thus getting rid of keyboard and mouse operations and making the human-computer interaction more straightforward. Mainly used in information inquiry in public halls, leading offices, electronic games, song and order, multimedia teaching, air ticket / train ticket pre-sale, etc. The products are mainly divided into three types: capacitive touch screen, resistive touch screen and surface acoustic wave touch screen.