After you have installed one of the user-friendly Linux distributions (such as Ubuntu), the first thing you will notice is the differences in the two desktops. In the images below you see the Windows XP desktop and the GNOME desktop. The first thing you will notice (besides the background images) is that GNOME has two panels running and XP only has one. But before we examine the actual differences, let's take a look at what each desktop offers.
XP: Panel (taskbar): Outside of desktop icons, this is where all applications are launched and small dockable applications live. Panel shortcut icons: Small icons that launch applications.Notification Area: Area of panel that houses tiny applets that give information and house applets that have no normal presence on the desktop. Desktop icons: Icons used to launch applications from the desktop.Show Desktop button: This button will hide all maximized windows so you can see your desktop.
GNOME: Panels: Same as XP, only GNOME defaults to two panels. You can move Panel elements around and combine everything on a single panel and then delete the now-empty panel so it looks much more like the XP desktop. Panel Launchers: Icons that launch applications from the Panel. Desktop Icons: Icons that launch applications from the desktop area. Notification area: This is where tiny applets live that give information and launch some configuration tools (such as networking or printing). Main Menu: This is where all applications are launched. Window List: This serves the same purpose as the XP Window list.