Touch input devices are tools that allow users to interact with electronic screens by touching them directly. Common examples include smartphones, tablets, and touchscreens found in laptops and kiosks. These devices use sensors to detect the location and pressure of a user's touch, enabling actions like tapping, swiping, and pinching. The technology behind touch input devices often involves capacitive or resistive screens. Capacitive screens, used in most modern devices, respond to the electrical properties of the human body, while resistive screens rely on pressure. Both types enhance user experience by providing intuitive control over applications and interfaces.