[nickpsecurity]

"NT is not a modified version of VMS, although some principle are obvious common."

Russinovich claimed it is in the linked article with evidence they even have similar internals just renamed. He's the goto guy for information on Windows Internals. DEC claimed same thing in lawauit. So, what evidence do you have that Windows NT kernel wasn't a reimplementation of OpenVMS design with modifications?

[MarkKB]

You claimed that Windows NT was VMS with modifications. That's not what Russinovich claims - he claims that the internal design is very similar to VMS, and thus NT's design was most likely heavily inspired by VMS's. "Architectural and design influences" is the strongest claim Russinovich makes in the article as to the link between NT and VMS.

In a similar way, Microsoft Word no doubt has "architectural and design influences" with Bravo (thanks to Charles Simonyi), but it would be false to conclude that Word is "a modified version of Bravo".