This document does not offer a complete description of the history, context, and internal structure of the athenaCL system; such a description, including comparative analysis to related historical and contemporary systems and detailed explanation of object models and interactions, is provided in the text An Open Design for Computer-Aided Algorithmic Music Composition: athenaCL (Ariza 2005a). Numerous additional articles are available that explore aspects of the athenaCL system in detail (Ariza 2002, 2003, 2004, 2005c, 2006, 2007a, 2007b, 2008, 2009b).