Which one of the following technologies is not a touch-screen technology ?

Touch-screen technologies are systems that allow a display to detect human interaction, typically via a finger. The most widely used technologies include Resistive (which relies on pressure to join conductive layers), Capacitive (which detects changes in electrical current caused by the human body), and Surface Acoustic Wave (often referred to simply as Surface technology in this context, which uses ultrasonic waves). Inductive technology, however, is primarily used for digitizers and graphics tablets (such as those by Wacom). It relies on electromagnetic induction between the screen and a specialized stylus. Because standard inductive