The Acorn Archimedes was Acorn Computers Ltd's first general purpose home computer to be based on their own ARM architecture.

Using a RISC design with a 32-bit CPU, at its launch in June 1987, the Archimedes was stated as running at 4 MIPS, with a claim of 18 MIPS during tests.

The name is commonly used to describe any of Acorn's contemporary designs based on the same architecture, even where Acorn did not include Archimedes in the official name.