The Mezzo Desktop Environment is... weird. It’s definitely cool, but still weird. You know how most desktops have a “desktop” where you can put files? Not here. Or menus with sub-menus to categorize and launch things? Not here either. Instead, there are four corners of your screen – each handling a general system task (such as Files or Programs) – with the goal of simplifying user interaction. Mezzo is primarily used in SymphonyOS.