A trade fair (trade show or expo) is an exhibition organized so that companies in a specific industry can showcase and demonstrate their latest products, service, study activities of rivals and examine recent trends and opportunities. Some trade fairs are open to the public, while others may only be attended by company representatives (members of the trade) and members of the press, and so trade shows are classified as either “Public” or “Trade Only”. They are held on a continuing basis in virtually all markets and normally attract companies from around the globe. For example, in the U.S. there are currently over 2500 trade shows held every year, and several online directories have been established to help organizers, attendees, and marketers identify appropriate events.