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In computing, the icon bar is the name of the dock in Acorn's RISC OS operating system, and is fundamental to the OS. Its introduction in 1987 (as part of Arthur, the predecessor to RISC OS) was a new concept in GUIs.[1][2] It displays icons through which access is provided to all parts of the computer that a typical user will require, from physical devices and system utilities to running applications, and will usually be their starting point for interacting with the system once it has finished booting.
[...] the first public appearance of the dock was the Iconbar in Arthur.
This GUI [...] introduced a new concept: a "Dock" or shelf at the bottom of the screen where shortcuts to launch common programs and tools could be kept.