Abstract: The invention provides an electronic device including a touch screen and a control system connected to the touch screen. The electronic device may display a digital image via a touch screen and sets at least an interaction region for the digital area. Each interaction region has corresponding interaction information recorded in a recognizing data. When a clicking even occurs on the touch screen, the control system determines whether the clicking position is in the interaction region. If the clicking position occurs in the interaction region, the control system retrieves the interaction data from the recognizing data and operates the electronic device according to the interaction information.

Abstract: A Personal Navigation Device (PND) includes: a Global Positioning System (GPS) module, a processing module, and a user interface module. The GPS module generates a current location value. The processing module, which is coupled to the GPS module, is utilized for comparing the current location value and a plurality of hint points. The user interface module, which is coupled to the processing module, provides a display device. When a difference between the current location value and any hint point is less than a first threshold, the display device displays stored real image data corresponding to the hint point.