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In addition to launchers and panel applets, the GNOME panel also features a notification area that applications can use to notify users of events. Notifications can be used to alert the user of new emails, available updates, upcoming meetings, or any number of other events.

Notifications are simple icons that your application can place in the notification area on the user's panel. Your application can then take further action when the user clicks on the icon. Currently, the notification system is implemented in the experimental Egg library; however, the next version of GTK+ will have support for notification icons.

The notification area is a freedesktop.org specification, so your notification icons will appear in other desktop environments as well. For more information on the notification area, see The System Tray Protocol Specification.