The Computers: Software: Operating Systems: BIOS: (Open Firmware BIOS )

Open Firmware (O-F) is processor and system independent boot code (firmware), IEEE 1275-1994 standard, written in Forth, field proven. Open Firmware BIOS Operating Systems Software Computers.

Open Firmware, or OpenBoot in Sun Microsystems parlance, is a standard defining the interfaces of a computer firmware system, formerly endorsed by the Institute of Electrical and Electronics Engineers (IEEE). (wikipedia)