This document provides an introduction to enterprise resource planning (ERP) systems. It defines ERP as techniques and concepts for integrated management of businesses as a whole from the viewpoint of effective management resource use to improve enterprise management efficiency. The document discusses common ERP myths, the history and evolution of ERP from MRP to MRP-II to current ERP tools. It also outlines advantages such as improved efficiency, information integration, flexibility, and better analysis and planning capabilities through use of latest technologies.