A public exhibition is an event where people can come together to view or participate in a display of items or activities. It can be anything from an art SHOW, to a trade SHOW, to a science fair. The two most common terms used to describe a public exhibition are 'EXPO' and 'SHOW'. An EXPO is a large-scale exhibition that typically involves many different exhibitors and activities, while a SHOW is a smaller-scale exhibition that usually involves fewer exhibitors and activities.