Abstract: A system has a primary server storing search data sets (“staks”) and a linked social network server. Interaction with the server is via a client and a Web site. There is a software agent code executing on the client. The software agent component provides full integration with underlying search engines so that users can continue to search in the normal way, using their favourite search engines, while benefiting from management of search staks, automatic stak selection, and result promotion. The system allows users to manage their staks and providing a range of social networking style services to help users make contact with other like-minded searchers. In addition, it allows users to search for relevant staks. The software agent component provides browser-based access to allow users to manage and share their searchers direct from their browser, as well as providing the benefits of search promotions as they search normally.