Origin is Silicon Graphics, Inc's brand name for their MIPS-based series of high-end servers implementing a  architecture. The following models exist:
Several similar model numbers exist but the difference is mostly to help sales droids. Origins are headless systems; when equiped with graphics they're selling under the Onyx product name however the basic system architecture stays unchanged.
- Onyx 2 is the name of the headful Origin 2000
- Onyx 3000 is the product name of the headful Origin 3000