The document discusses key aspects of customer relationship management (CRM), enterprise resource planning (ERP), and supply chain management (SCM) systems. It provides definitions and examples of each, including business processes supported, customer/business value, and potential challenges. Case studies illustrate how companies have implemented CRM, ERP and SCM systems, and both realized benefits and faced challenges, such as change management and technical issues. Trends including analytical, collaborative and portal-based systems are also discussed.