This report provides an overview of different types of companies, including micro businesses, small businesses, medium businesses, and large businesses. It explains the characteristics of each type and provides case examples. The report also discusses various business structures, such as functional structure, divisional structure, matrix structure, and flatarchy structure. Additionally, it explores how external factors, such as political, economic, social, technological, legal, and environmental factors, affect business performance. Case examples and analysis are included to illustrate the impact of these factors on businesses.