Meaning of Term "Heartbeat" - AutoCAD communicates with a license server every minute, hence the term "heartbeat," Autodesk Knowledge Base, July 12, 2005

Migrating to 2006 - trials and tribulations from over 2 weeks of upgrading to AutoCAD 2006, Melanie Stone, Mistress of the Dorkness, June 23, 2005

AutoCAD 2006 for CAD Managers, Part 3 - concluding part of the coverage of the CUI command and customization functions that CAD managers can perform with its help, Robert Green, Cadalyst Management, June 23, 2005

AutoCAD 2006 for CAD Managers, Part 2 - menu mechanics of CUI command are explored and tips on how to use it to your advantage, Robert Green, Cadalyst Management, June 9, 2005