Micro Saint Sharp is a general purpose, discrete-event simulation software tool. Micro Saint Sharp's intuitive graphical user interface and flow chart approach to modeling make it a tool that can be used by generalists as well as simulation experts. Micro Saint Sharp has proven to be an invaluable asset in both small businesses and Fortune 500 companies and in many areas including the military, human factors, health care, manufacturing, and the service industry. The user manual has been updated for software version 3.8. Some new features are the ability to add swim lanes to any network background, data exchange capability with the UML/SysML tool MagicDraw, and a updated version of the built-in OptQuest optimization.