In computing, the taskbar is a term for an application esktop bar which is used to launch and monitor applications. The taskbar concept was first implemented in Acorn Computers' Arthur operating system, which was released in 1987 for their Acorn Archimedes computer. Microsoft incorporated a taskbar in Windows 95 and has been a defining aspect of Microsoft Windows's graphical user interface ever since. Other desktop environments, such as KDE and GNOME also include a taskbar.