stylus or other pointing device; a display able to detect the location of touch(es) within the display area or within portions thereof; a screen capable of operating as a display unit and as an input unit; a touch-screen of a PDA device; a touch-screen of a mobile phone; a touch-screen of a tablet PC; a resistive based touch-screen; a capacitive based touch-screen; an InfraRed (IR) based touch-scr