graph BT A[Hardware] --> B[Kernel] A --> id1([amd64, ARM, PowerPC]) B --> C{Display server} B --> id2([FreeBSD, Linux, macOS, Windows]) C --> D(Display manager) C --> id3([X11, Wayland]) D --> E(Session manager) D --> id4([SDDM, GDM, LightDM]) E --> F(Window manager) E --> id5([Xfce4-session]) F --> G[Graphical User Interface] F --> id6([KWin, Mutter, Xfwm4]) G --> H[User] G --> id7([KDE Plasma, Gnome, Xfce4])