A set of criteria is acquired that defines a category of entities. The set of criteria is dynamically applied to identify an entity that meets the criteria. It is determined that the entity is registered as having control over at least a portion of a World-Wide Web address. The at least a portion of a World-Wide Web address is associated with the entity in a presentation that indicates that the entity belongs to the category of entities. In the presentation, a link may be included to a set of computer data about the entity. The set of computer data includes information other than information provided at a World-Wide Web site corresponding to the World-Wide Web address.