- [3.1.1] The Command line (CMD, 4OS2, Takecommand, Tshell, ,,,
- [3.1.2] Grafical userinterfaces (Mshell, Mdesk, Staroffice, ....
- [3.1.3] The workplace shell and extensions (classtree, launchpad, taskbar, add-on classes, styler, xfolder, object desktop
- [3.1.4] Remote control and automatic control
