Touch+Sensitive+Devices.


 * Touch Sensitive Devices**

These are devices that can detect the presence and location of a touch in a specific area, usually from a hand or a finger. However they can also be sensitive to pressure from, say, a stylus.

The touch screen has two main attributes, firstly it allows the user to interact directly with what they are seeing, secondly there is no need for third party devices such as a mouse or other buttons (such as a composite controller).

The main types of touch resistive technologies are:
 * - Resistive**, this is where there are basically two conductive layers that work as voltage dividers, this information could then be translated into an action on the screen.
 * - Surface acoustic wave**, this is where minute sound waves travel across the screen and when someone touches it the waves are absorbed, which the detectors pick up on. This information is then translated into an action on the screen.
 * - Capacitive**, this is where an insulator such as glass is covered in a transparent coating of a conductor, and since the body itself can conduct electricity, the electrostatic field is interrupted when it is touched, which is a measure of "capacitance". This, like the others, is then translated as an action on the screen.