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Acorn Archimedes A440
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== Operating System == The A440 was shipped with Arthur 1.2 . Arthur featured a primitive task-switching GUI, with version 0.30 released in June 1987 and 1.20 in September . For version 2 (October 1988), Arthur was renamed to RISC OS, which featured an updated GUI enabling co-operative multitasking of applications . Earlier models which shipped with Arthur could be upgraded to RISC OS 2 by replacing the ROM chips containing the operating system . RISC OS 2 was a vast improvement over Arthur, allowing multitasking of programs with certain limitations .
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