This report provides an understanding of different types of companies and their structures, including micro businesses, small businesses, medium-sized businesses, and large-scale organizations like Tesco. It explains the characteristics and functioning of each type of company. The report also discusses different business structures, such as sole traders, partnerships, companies, and public limited liability businesses. Additionally, it explores how external factors like political, economic, social, technological, environmental, and legal factors impact businesses, using Tesco as an example. Overall, the report highlights the importance of considering external factors and choosing the right organizational structure to achieve business objectives.