Why on the list: arm is the main designer of RISC (reduced instructionsetcomputing) chips used in such battery-powered information appliances as handlheld PCs and mobile phones.
Joel Birnbaum was the head of HP Labs at the time and he knew that RISC (Reduced InstructionSet Computing)architecture was the future and not CISC (Complex InstructionSetComputing).
It is comprised of smaller revenue generating product lines such as digital light processing (DLP) projectors and reduced-instruction setcomputing (RISC) microprocessors.