US Patent 7093201 Loop menu navigation apparatus and method

A curved-listing file hierarchy and a preview window for more efficiently displaying file hierarchy information on a data processing device. Curved-listing file hierarchies may allow more elements of a file hierarchy to be displayed in a smaller space. This may be especially useful for the smaller screens of some data processing devices like Personal Digital Assistants and cellular phones. A preview screen may allow a user to view preview information on a file in the hierarchy without actually opening the file.