Common Hardware Reference Platform (CHRP) was an early PowerPC hardware reference design. The successor of PReP, it was conceptualized as a design to allow various operating systems (especially Mac OS, Windows NT and various flavors of UNIX) to run on a common hardware platform. It did not catch on, and the only systems to ship with actual CHRP hardware were certain members of IBM's RS/6000 series machines running AIX. New World ROMMacintosh computers are partially based on CHRP/PReP.
External link
penguinppc.org description of chrp (http://penguinppc.org/otherhw/#chrp)
MCG (Motorola Computer Group) did their own system design for their CHRP machines (eg, they didn't use the system parts Apple and PIOS and others get from Motorola SPS), and they were gearing up for eventually selling billions worth of MacClones.
CHRP eliminates this, moving the abstraction level to two firmware level subsystems (OpenPIC and RTAS).
CHRP is a publically defined standard, anything I do on my own is going to be considered proprietary, even if I give the specs away.