This document provides an overview of the OpenERP open source ERP software. It describes OpenERP as being open source, comprehensive with over 700 modules, modular allowing customers to start with one application and add more later, flexible allowing customization of the user interface, and affordable with no license fees. It also discusses OpenERP's vision of making business applications affordable for any company, its business model of leveraging community contributions and a volume sales model, and provides highlights of key features for various OpenERP functional modules.