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.