ARM, originally Acorn RISC Machine, later Advanced RISC Machine, is a family of reduced instruction set computing(RISC) architectures for computer processors, configured for various environments. British company ARM Holdingsdevelops the architecture and licenses it to other companies, who design their own products that implement one of those architectures including systems-on-chips that incorporate memory, interfaces, radios, etc. It also designscores that implement this instruction set and licenses these designs to a number of companies that incorporate those core designs into their own products
A RISC-based computer design approach means processors require fewer transistors than typical complex instruction set computing (CISC) x86 processors in most personal computers. This approach reduces costs, heat and power use. Such reductions are desirable traits for light, portable, battery-powered devices—including smartphones, laptops andtablet computers, and other embedded systems. For Supercomputers, which consume large amounts of electricity, ARM could also be a power-efficient solution.