This article explores the different types of companies, including micro businesses, small businesses, medium-sized businesses, and large corporations. It discusses the characteristics and challenges of each type of business and how they operate. The article also examines different business structures, such as sole traders, partnerships, public limited liability businesses, and cooperative businesses. Additionally, it discusses how external factors, such as political, economic, social, technological, environmental, and legal factors, can impact businesses. Overall, it provides insights into the various aspects of companies and their structures.