extensible firmware interface

from The Free On-line Dictionary of Computing (8 July 2008)

Extensible Firmware Interface
EFI

   <specification> (EFI) A specification originating from {Intel
   Corporation}, defining the {interface} between an {operating
   system} and {platform} {firmware}, and aiming to reduce OS
   dependence on details of the firmware implementation.

   EFI Home (http://intel.com/technology/efi/).

   (2004-10-23)