A 32Bit RISC Microprocessor originaly designed by Acorn Computers Ltd, Cambridge, England, for the Acorn Archimedes (The first consumer RISC computer (in 1987)).
Acorn begat ARM Limited who went on to produce the Arm 3, 600, 700 and the (with DEC) the Strong ARM used in the Corel NetWinder, and the Digital Shark.