Pretty much the same thing happened to Acorn as happened to Commodore. They got into trouble and the various properties and brand names split and went seperate ways. Another sad end to a once great computer developer. At least, unlike Commodore, some subsidiaries of the original company do still exist, such as ARM holdings who still develop amd make the RISC ARM processors.
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And RISCOS is still being developped.

And I think someone is still making RISCPCs and other RISCOS compatible machine, but I don;t know too much about those.
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