WM = Window manager [ie : i3, Openbox, Awesome, bspWM, dWM]
DE = Desktop environment [ie : Xfce, GNOME, KDE]
WM ekakin karanne windows manage karana eka vitharai. KDE, Xfce, GNOME kiyanne DEs. DE ekakata DE eka hadapu ayama hadapu WMs thiyenava. Hariyata nikan Xfce vala XFWM, KDE vala KWin...