This report examines the role of information systems, specifically focusing on Enterprise Resource Planning (ERP) systems within the context of Marks & Spencer (M&S). It begins with an introduction to information systems, their components, and categories, including Transaction Processing Systems (TPS), Management Information Systems (MIS), Decision Support Systems (DSS), and Executive Information Systems (EIS). The report then delves into the specifics of ERP systems, detailing their functions, benefits, and key aspects, such as centralized databases and modular designs like Netsuite and SYSPRO. It highlights how ERP systems enhance productivity, facilitate collaboration, and improve data security. Furthermore, the report offers recommendations for ERP implementation, emphasizing the importance of aligning the system with business requirements and the need for a robust internal project management system to maximize performance across all departments. The conclusion reiterates the essential role of information systems, particularly ERP, in driving organizational efficiency and decision-making.