This document provides an overview of different types of businesses based on size and form, including micro, small, medium, and large businesses, as well as sole proprietorship, partnership, limited liability business, public limited liability business, and cooperative. It also discusses the impact of organisational structure on business productivity and uses PESTEL analysis to explain how external factors affect the performance of a business. The case study focuses on Marks & Spencer, a multinational company dealing in home products, food, and clothing.