This report, focusing on BMP3002 Business in Practice, provides a comprehensive overview of business organizations. It begins by classifying businesses based on size, differentiating between micro, small, medium, and large enterprises, and discussing their characteristics, including turnover, number of employees, and management structures. The report then delves into the legal structures of organizations, explaining sole proprietorships, partnerships, limited liability companies, private limited companies, and public limited companies, highlighting their features and implications. Furthermore, it examines various organizational structures, such as line, functional, divisional, matrix, and network structures, assessing their usefulness in enhancing productivity. The report concludes by analyzing the impact of external factors on the business environment, utilizing PEST analysis (Political, Economic, Social, Technological, Legal, and Environmental) to assess the influence of these factors on business operations and decision-making, using Tesco as a case study. The report aims to provide a clear understanding of different organizational structures and their relevance in the business world.