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'''Acorn RISC Machinesmachines''' are a series of computers based on ARM architecture processors and the RISC OS operating system.
The '''[[wikipedia:Acorn_Archimedes|Acorn Archimedes]]''' is a family of personal computers designed by Acorn Computers Ltd in Cambridge, England. The first model was introduced in 1987, and systems in the Archimedes family were sold until the mid-1990s. ARM's RISC design, a 32-bit CPU (using 26-bit addressing), running at 8 MHz, was stated as achieving 4.5+ MIPS, which provided a significant upgrade from 8-bit home computers, such as Acorn's previous machines. The first models were named "BBC Archimedes", yet the name "Acorn Archimedes" is commonly used to describe any of Acorn's contemporary designs based on the same architecture.
