Abstract: A convention processing system is provided that includes a database operable to store show information identifying at least one show in which a plurality of exhibitors will exhibit their wares, service information identifying a plurality of services available to the exhibitors at the show, supplier information identifying at least one supplier for each service and a plurality of suppliers for at least one service, and at least one item for each service, the item identifying a particular type of the service, a price for the item and a supplier for the item. The system further includes a transaction engine operable to access the database. The transaction engine is also operable to display the services for the show, receive a selection of a service, display a list of items for the service, receive a selection of an item for an exhibitor, store the selection of the item as an order, add the price for the item to a balance for the exhibitor, and display an updated account summary for the exhibitor.