ARM Ltd.  
   Designs and licenses fast, low-cost, low-power RISC processors, peripherals, and 'system-chips' for embedded control, consumer/educational multimedia, portable systems, Acorn RISC OS PCs, DSP.
   http://www.arm.com/

ARM Documentation  
   ARM's repository of technical documentation on their processors, the heart of all RISC OS boxes.
   http://www.arm.com/Documentation/

Intel XScale Microarchitecture  
   ARM v.5TE instruction set compliant, new microarchitecture: full-featured, low cost, low-power; supports 16-bit Thumb and integrated digital signal processor (DSP) instructions. Develop wide range of Internet devices from one processor core.
   http://developer.intel.com/design/intelxscale/

ARM Instruction Formats/Timings  
   From Robin Watts, Steven Singer, Mark Smith, David Seal, some others; in multiple formats.
   http://www.pinknoise.demon.co.uk/ARMinstrs/index.html

Amulet Group  
   Researching asynchronous computing methods, especially lower electricity use. World's first implementation of a commercial microprocessor architecture (ARM) in asynchronous logic. Micropipeline design style.
   http://www.cs.man.ac.uk/amulet/

Cirrus Logic, Inc.: Embedded Processors  
   ARM-based systems-on-chip, leverage Cirrus' mixed-signal expertise; used in wide range of consumer products: set-top boxes, smartphones, screen phones, network computers, game boxes, handheld digital assistants, 2-way messaging devices.
   http://www.cirruslogic.com/design/products/index.cfm?DivisionID=6

Bluewater Systems  
   ARM technology specialists. ARM technology in the South Pacific region.
   http://www.bluewatersys.com/