The Gopher server is no longer involved until the telnet session is terminated. This indicates resources for which searchable indexes have been created. Files with searchable indexes may be, for example, books, dictionaries, reference sources, bibliographies, network addresses, software catalogues, Internet information, archives of Usenet newsgroups and Listserv mailing lists, or various specialized indexes, databases and texts. Once you select an index search menu item, you are prompted to enter a search query. You can then select any item from this customized menu in the same way that you would for any Gopher menu item.
Index searches are specific to the computer on which the resource resides.
Each server can have its own set of rules. Searches are not case sensitive. Some allow only single word searching. There are various interpretations of multiple word search rules. Basically, it is recommended that you use a single word search.