This report provides a comprehensive analysis of various company types, ranging from micro-businesses to large corporations, detailing their characteristics and functions. It assesses different company forms, including sole traders, partnerships, private limited companies, public limited companies, and cooperative associations, highlighting their unique features. Furthermore, the report examines various business organizational structures, such as functional and divisional structures, and analyzes how external factors, using the PESTEL framework, affect business organizations. The analysis incorporates political, economic, social, technological, environmental, and legal factors, emphasizing their impact on business productivity and overall performance. The report uses Marks & Spencer as an example.