This manual discusses the use and interface of the GibbsCAM Advanced CS option. The Advanced CS option provides additional functionality for the Mill module, allowing users to work with multiple coordinate systems in order to create and machine geometry in more ÒadvancedÓ ways. Recommended prior reading: Geometry Creation; Mill. Last major update: March 2007, for GibbsCAM 2007; minor revisions January 2015, for GibbsCAM 2015, v11.0