HAND-HELD COMPUTER APPARATUS WITH THREE BUTTON INTERFACE AND METHODS REGARDING SAME

摘要

A computer apparatus includes a computer processing unit for operating upon data and providing data for display and a handheld input/output display unit. The display unit includes a housing sized to be grasped by a user's hand. A computer display is located within the housing at a position to allow the user to view the display through an eyepiece. A three button user input interface is integrated with the computer display in the housing and is operatively connected to provide user input to the processing unit. The computer processing unit may also be integrated into the housing with the display. Further a method of navigation using the three button user input interface is provided, e.g., using a tree based structure and/or a circular navigational structure.