Proper noun
UEFI
(computing) Initialism of Unified Extensible Firmware Interface: a specification that defines a software interface between an operating system and platform firmware.
According to Microsoft, the KB4524244 security patch was designed to 'address an issue in which a third-party Unified Extensible Firmware Interface (UEFI) boot manager might expose UEFI-enabled computers to a security vulnerability.' Source: Internet
According to these slides on replacing UEFI with Linux: Between Linux and the hardware are at least 2 ½ kernels. Source: Internet
ESET is the first internet security provider to add a dedicated layer into its solution that protects the Unified Extensible Firmware Interface (UEFI). Source: Internet
Given that all current OS's are UEFI aware I can see the 'Legacy' Source: Internet
Instead, the key is stored in the computer’s UEFI firmware or BIOS by the manufacturer. Source: Internet
Intel(R) Management Engine Interface (v11.7.0.1040) is required for UEFI update, and improves recovery from Connected Standby. Source: Internet