This report provides a comprehensive analysis of the business environment, focusing on the structures, purposes, and interrelationships of various types of organizations. The report examines three organizations: Ryanair (private sector), NHS (public sector), and Cancer Research UK (voluntary sector). It details the purposes, legal structures, sizes, and scopes of these organizations. Furthermore, the report analyzes the interrelation between organizational functions and objectives, particularly focusing on the roles of HR, finance, and IT departments within Ryanair. The analysis explores how these departments contribute to the achievement of organizational goals, including revenue enhancement and customer satisfaction. The report also includes a critical analysis of different business structures and their complexities, providing insights into how these structures influence organizational performance and objectives.