| 摘要 |
<p>A computing system includes a hierarchical set of servers. The hierarchical set includes a master server and one or more slave server. The master server and slave servers communicate with at least one non-intelligent user system over a communications network. The master server has full access to each non-intelligent user system. The master server controls access permissions for each slave server to the non-intelligent user system(s). Each higher level slave server can control access permissions for sub-level slave server(s) to the non-intelligent user system(s). A master or, if permitted access, a slave server, creates a window in a display of the non-intelligent user system, and can provide access to the window to any lower-level slave server to send pixels to fill that window. The pixels can be the graphics output of an application such as a browser or spreadsheet or the pixels can be video.</p> |
