Microsoft Dynamics NAV is an enterprise resource planning (ERP) software product from Microsoft. The product is part of the Microsoft Dynamics family, and intended to assist with finance, manufacturing, customer relationship management, supply chains, analytics and electronic commerce for small and medium-sized enterprises. Value-added resellers (VAR)s can have full access to the business logic source code, and it has a reputation as being easy to customize.In November 2008 Microsoft released Dynamics NAV 2009, with a new role-based GUI. Microsoft originally planned to develop an entirely new ERP system (Project green), but has decided to continue development of all ERP systems (Dynamics AX, Dynamics NAV, Dynamics GP and Dynamics SL). All four ERP systems will be launched with the same new role based user interface, SQL based reporting and analysis, SharePoint based portal, Pocket PC based mobile clients and integration with Microsoft Office.