Abstract: An end-user interface system for a computer, telephone or other electronic apparatus used to access the Internet or operating in standalone mode for navigating, displaying, and manipulating folders and files, web page links, and Internet bookmarks, such that each displayed folder, file, web page link, or Internet bookmark is displayed in a cell on a grid. To activate or further explore a particular file, an end-user activates a key on a computer keyboard or numeric keypad of a telephone or other electronic apparatus that corresponds to a particular option located within a cell on the grid. Hierarchical information such as file or folder structure, web site organization, or Internet bookmarks are arranged into the grid configuration. Use of the interface allows the manipulation of hierarchical data structures using a simple keypad having keys which correspond to the physical organization of the displayed grid, thus alleviating the need to use cumbersome or confusing point and click devices.