ARM Holdings plc (ARM) is a British multinational semiconductor and software design company, owned by SoftBank Group. Headquartered in Cambridge, United Kingdom, its primary business is in the design of ARM processors (CPUs), although it also designs software development tools under the DS-5, RealView and Keil brands, as well as systems and platforms, system-on-a-chip (SoC) infrastructure and software. It is considered to be market dominant for processors in mobile phones (smartphones or otherwise) and tablet computers. The company is one of the best-known 'Silicon Fen' companies.
Processors based on designs licensed from ARM, or designed by licensees of one of the ARM instruction set architectures, are used in all classes of computing devices.