Computer Firmware

EFI/UEFI

Found on most modern x86 PCs and servers, along with some ARM boards – (wikipedia)

BIOS

Found on older “IBM-PC” machines, generally most regular PCs and servers that were manufactured before 2011 – (wikipedia)

OpenFirmware

also known as OpenBoot, Found on Sun SPARC systems, IBM Power, PowerPC-based Apple Macintosh, IEEE 1275-1994… (wikipedia)

Coreboot (LinuxBIOS)

Can be used on some boards and tested under emulators – (wikipedia)

PMON2000