Reserved Categories have a desktop-specific meaning that has not been standardized (yet). Desktop entry files that use a reserved category MUST also include an appropriate OnlyShowIn= entry to restrict themselves to those environments that properly support the reserved category as used.
The table below describes Reserved Categories.
|Screensaver||A screen saver (launching this desktop entry should activate the screen saver)|
|TrayIcon||An application that is primarily an icon for the "system tray" or "notification area" (apps that open a normal window and just happen to have a tray icon as well should not list this category)|
|Applet||An applet that will run inside a panel or another such application, likely desktop specific|
|Shell||A shell (an actual specific shell such as