This report provides an evaluation and understanding of different types of companies based on their sizes and legal structures. It explores micro, small, medium, and large businesses, as well as sole traders, partnerships, limited liability businesses, public limited liability businesses, and cooperatives. The report also discusses the impact of organizational structure and external factors on business productivity, using Tesco Plc as an example. It covers the political, economic, social, technological, legal, and environmental factors affecting the performance of businesses.