"The Unified Extensible Firmware Interface (UEFI) Shell is designed for programmers who are writing automation process software for computer-based equipment. Traditionally this software was based on various DOS family operating systems that were popular during the 1980s. While the processes may vary from hardware validation to software testing to manufacturing, the basics of automation are the same. The UEFI Shell provides a modern base to the traditional commands common to any operating system. It does so in many cases in the words that the programmers speak, even if they at times speak different languages."
Yep, it's really an operating system now. This is all quite unbelievable ...
ron