This report provides a comprehensive overview of various company types, ranging from micro-businesses to large corporations, and explores different legal structures such as sole proprietorships, partnerships, limited liability companies, and cooperatives. It delves into organizational structures, including functional and divisional structures, and analyzes how these structures impact business productivity. Furthermore, the report examines external factors affecting business performance through a PESTLE analysis, focusing on political, economic, social, technological, environmental, and legal influences, particularly in the context of Sainsbury's supermarket chain. The study highlights the importance of understanding both internal structures and external factors for achieving business success and sustainability.