1. A method of selecting database items from a database, the database items being indexed by a list of item identifiers, the method comprising the steps of: generating an initial display including one or more parts of item identifiers for selection, enabling selection of the one or more parts and in response to selection of the one or more parts, generating a display of a further one or more parts for selection, and enabling selection of the further one or more parts in order to add to the selected one or more parts to build a larger part or whole of an item identifier.