The article... well, it doesn't bury the lede, but it does completely omit it outside of the headline. For anyone who doesn't know the context: The BBC Micro was built by Acorn Computers, which proceeded to design the Acorn RISC Machine -- later renamed to Advanced RISC Machine and thence to simply "arm".
In many ways, the tuple (BBC Micro, Acorn Computers, arm) is analogous to (IBM PC, Intel, x86).
In many ways, the tuple (BBC Micro, Acorn Computers, arm) is analogous to (IBM PC, Intel, x86).