Advanced RISC Machine

Why Trust Techopedia

What Does Advanced RISC Machine Mean?

Advanced RISC Machine (ARM) is a processor architecture based on a 32-bit reduced instruction set (RISC) computer. Licensed worldwide, the ARM architecture is the most commonly implemented 32-bit instruction set architecture. ARM architecture is implemented on Windows, Unix, and Unix-like operating systems, including Apple iOS, Android, BSD, Inferno, Solaris, WebOS, Plan 9 and GNU/Linux.


Advanced RISC Machine was originally known as Acorn RISC Machine.

Techopedia Explains Advanced RISC Machine

Acorn Computer Group developed the first RISC processor in 1985, which was followed by its release of the first budget-friendly PC processor. In 1990, ARM was released. It was the result of a collaborative effort between Acorn and Apple Computer to establish a new microprocessor standard.

ARM features include:

  • Load/store-based architecture
  • Single-cycle instruction execution
  • Consistent 16×32 bit register file
  • Link register
  • Easy decoding and pipelining
  • Power-indexed addressing modes
  • Fixed 32-bit instruction set

Popular ARM-based processors include ARM7, ARM9, ARM11 and cortex. ARM Holdings Group licenses processor architecture on behalf of parent company ARM Holdings PLC. ARM provides compiler, debugger and software development kit tools, along with a complete hardware description of the ARM core, to interested parties.


Related Terms

Margaret Rouse
Technology Expert
Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.