Similarly, the kernel of Xenix used letters A to Z to indicate which stage of the initialization it had reached: https://www.scosales.com/ta/kb/105420.html http

Similarly, the kernel of Xenix used letters A to Z to indicate which stage of the initialization it had reached: https://www.scosales.com/ta/kb/105420.html https://www.scosales.com/ta/kb/105420.html Helpful for debugging issues. I assume this was common with other Unices.