RISCO's mission statement∞ clearly manifests its goal, which "To provide a continued availability and route to market for the RISC OS 4 product originally developed by Acorn Computers and to develop that product into a full 32 bit based operating system to support the future generations of ARM based processors."

However, what are ARM based processors anyway? There is limited information about this online and even in essay topics∞.Here are a few resources for basic information about it:

http://en.wikipedia.org/wiki/ARM_architecture∞ - a Wikipedia article on ARM that shows how ARM was created and developed to its classifications.

http://infocenter.arm.com/help/topic/com.arm.doc.faqs/ka4885.html∞ - provides tips on how to choose ARM processors.