The original VMS kernel was written in assembler. It is doubtful that anyone would want it. I don't know how later versions changed. In any case, Windows NT (

The original VMS kernel was written in assembler. It is doubtful that anyone would want it. I don't know how later versions changed. In any case, Windows NT (re)used a number of concepts from VMS. https://en.wikipedia.org/wiki/Windows_NT#Development https://en.wikipedia.org/wiki/Windows_NT#Development "Although NT was not an exact clone of Cutler's previous operating systems, DEC engineers almost immediately noticed the internal similarities. Parts of VAX/VMS Internals and Data Structures, published by Digital Press, accurately describe Windows NT internals using VMS terms."