A method of operating a hand-held computer including a database and a data port for communications with a server, the database including a plurality of records that correspond to a folder data structure. The method comprises searching the database for an available folder ID; creating a folder, the folder...http://www.google.co.uk/patents/US6526413?utm_source=gb-gplus-sharePatent US6526413 - Architecture for a hierarchical folder structure in hand-held computers
