This directory contains the original files and directory tree structure as
received from the authors. In addition the file DB96-243.ZIP, contained in
this directory, has been added to allow a single file download. This file
contains all the files and directory tree structure of this directory in
the PKZIP format. To unzip and restore the directory tree structure, use
the -d command line option.

The organization of the directories is explained by the authors in the file, 
INTRO.TXT  .