Abstract: A method for identifying a relevant application includes displaying a plurality of icons corresponding to applications, selecting an icon corresponding to a target application from among the plurality of displayed icons, determining a category of the target application, and identifying a relevant application based on the determined category of the target application. A device to identify a relevant application includes a display unit to display a plurality of icons corresponding to applications, an input unit to receive a selection of an icon corresponding to a target application from among the plurality of icons, and a control unit to determine a category of the target application, and to identify a relevant application based on the determined category of the target application.

Abstract: Provided are an input apparatus and an input method using a human body contact in which an electric current at a contacted part of a human body varies at different parts of the human body, and an input corresponding to the measured electric current is sensed.

Abstract: A user interface apparatus using three-dimensional axes and a user interface apparatus using two-dimensional planes, each of the two-dimensional planes being formed by two of three-dimensional axes, are provided. The user interface apparatus uses the three-dimensional axes or the two-dimensional planes to select a menu or to search for desired information in a device, such as a mobile terminal.