A world expo, also known as a world's fair, is a large global exhibition designed to showcase the achievements of nations. These exhibitions vary in character and are held in different parts of the world at a specific site for a period of time, typically between three and six months. The term "world's fair" is commonly used in the United States, while the French term "Exposition universelle" is used in most of Europe and Asia. World Expos, officially known as International Registered Exhibitions, are a global gathering of nations dedicated to finding solutions to pressing

. The Bureau International des Expositions (BIE) sanctions world expositions, which include World Expos and Specialised Expos. World Expos take place every five years and last up to 6 months, while Specialised Expos take place between two World Expos and last up to 3 months