Version 6.22.1. Updated January 2024.
Version 6.22. Updated December 2023.
Version 6.21. Updated May 2023.
Version 6.20. Updated September 2021 (20th anniversary edition).
Version 6.0. Updated March 2021.
Version 5.4. Updated March 2020.
Version 5.3. Updated September 2018.
Version 5.2. Updated August 2016.
Version 5.1. Updated July 2015.
Version 5.0. Updated April 2015.
Version 4.7. Updated September 2013.
Version 4.6. Updated November 2012.
Version 4.5. Updated January 2011.
Version 4.4. Updated August 2010.
Version 4.3. Updated December 2009.
Version 4.2. Updated March 2009.
Version 4.1. Updated July 2008.
Version 4.0. Updated September 2007.
Version 3.2. Updated July 2006.
Version 3.1. Updated January 2006.
Version 3. Updated February 2005.
Version 2.1. Updated August 2003.
Version 2. Major update published February 2003.
Version 1. First published September 2001 by DI Management Services Pty Limited.