Arm Holdings plc is a British semiconductor and software design company headquartered in Cambridge, whose primary business is the design of central processing unit cores that implement the ARM architecture family of instruction sets. It also designs other chips, provides software development tools under the DS-5, RealView and Keil brands, and provides systems and platforms, system-on-chip infrastructure and software. As a holding company, it also holds shares of other companies. Since 2016, it has been majority owned by Japanese conglomerate SoftBank Group. "ARM" was originally an acronym for Acorn RISC Machine and later for Advanced RISC Machines. While ARM CPUs first appeared in the Acorn Archimedes, a desktop computer, today's systems include mostly embedded systems, including ARM CPUs used in virtually all modern smartphones, up to used in the fastest supercomputer. 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. Arm has two lines of graphics processing units, Mali, and the newer Immortalis. Arm's main CPU competitors in servers include IBM, Intel and AMD.