Can a touch screen respond to more than one touch at the same time?
Most touch screens can only respond to one touch at a time. Some touch screens will average together multiple touches, causing the mouse cursor to move to a position between the points touched. Other touch screens will accept the first touch and then ignore simultaneous touches.
There is a new technology now available called “multi touch” that enables some screens to detect multiple touches at the same time. This can create exciting and new applications, particularly in the areas of dragging multiple items around a screen at the same time. “Multi touch” touch screen technology no longer emulates a left mouse click, so some programming may be required.