Copyright © 1993 - 2009 dtrends.com
dtrends.com holds the copyright to its publications and Web pages but encourages duplication
of these materials marked with "Fair Use" for noncommercial purposes.
dtrends.com prohibits modification of these materials, and proper citation is requested.
Permission to make digital or hard copies of part or all
of this work for personal or classroom use is hereby granted without fee and without a formal
request provided that copies are not made or distributed for profit or commercial advantage
and that copies bear this notice and full citation on the first page.
Copyright for components
not owned by dtrends.com must be honored and permission pursued with the owner of the information.
To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires
prior specific permission. Request permission to publish from: