This report provides an in-depth analysis of information systems and their categories, focusing on their application within a business context, specifically using Arash Motor Company Ltd as a case study. It explores various types of information systems, including Transaction Processing Systems, Management Information Systems (MIS), and Decision Support Systems, detailing their functions and importance at different organizational levels. The report then delves into Enterprise Resource Planning (ERP) systems, explaining their benefits, types (cloud, on-premise, and hybrid), and their role in integrating business functions like planning, manufacturing, and sales. The discussion includes real-life examples of ERP systems such as Netsuite ERP, SAP ERP, and Sage ERP, highlighting their advantages in reducing costs, streamlining processes, improving customer satisfaction, and increasing competitiveness. The report concludes with recommendations for Arash Motor Company Ltd to leverage information systems and ERP for better data management, decision-making, and overall business performance. The report emphasizes the crucial role of information systems in driving efficiency and achieving business success.