The replacement for BIOS on PCs and servers. An operating system in its own right, comparable in complexity to DOS.
"How to Access the EFI Shell to carry out Systems Diagnostics or Updates": Turns out the shell can read USB-key drives and execute .EFI executable files--which is interesting in of itself--and this article describes how to boot into an Intel machine and use the UEFI shell to do that.
Programming for EFI: Building programs for the EFI environment.
Last modified 01 July 2021