1. A user interface, comprising: a controller for controlling an overall operation of the interface unit, the controller being configured to associate an application with each of a plurality of polygonal units; a video generator operatively connected to the controller and configured to generate a polygonal column including said plurality of polygonal units; a display screen operatively connected to the controller and video generator unit and configured to display each application in the polygonal unit thereon and a gesture interpreting device operatively connected to the controller and configured to interpret a user's finger gesture on the display screen so as to display each application according to the user's finger gesture, wherein the display screen is controlled by the controller based on the user's finger gesture to display one application or split into at least two display segments to simultaneously display at least two different applications which can be operated concurrently and/or independently, and wherein the gesture interpreting device detects a user's finger location on the display screen, detects the user's finger gesture, determines whether the user is splitting the display screen, and splits the display screen into at least two display segments to display at least two different applications when the user's gesture is recognized to split the display screen by detecting a plurality of the user's fingers on the display screen.