The International Standard Industrial Classification of All Economic Activities, commonly known as ISIC, is a system developed by the United Nations to categorize economic activities. It provides a framework for collecting, analyzing, and comparing statistical data across different countries and industries. The classification helps in understanding the structure of economies and facilitates international trade and economic research. ISIC is organized into sections, divisions, groups, and classes, allowing for detailed classification of industries. This system is widely used by governments, researchers, and organizations to track economic performance, formulate policies, and conduct market analysis. It plays a crucial role in economic planning and development.