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EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack.

EFI stands for Extensible Firmware Interface, and is an updated version of BIOS. It sits between firmware and the operating system in the software stack. It was originally developed by Intel, and development ceased in 2005 when Intel contributed it to the Unified EFI Forum, which developed and develops the Unified Extensible Firmware Interface.

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