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.
Acorn Computer ATOM The Acorn Atom was the ancestor of the BBC computers series. It was sold in kit or ready-assembled versions. The great advantage of the Atom compared to its competitors (TRS-80 & PET), was its high resolution capabilities (256 x 192) which were quite unusual in 1979 for the price.
The Acorn ABC 210 / Cambridge Workstation was the only model from the announced, marketed but unreleased ABC (Acorn Business Computer) line, first claimed to be available in October 1984. The ABCs were a range of machines using an integrated monitor, disk drive, PSU and BBC B+ 64K motherboard with slight modifications, originally featuring CPUs from straight 6502 terminals to an 80286 based system.