[shrubble]

DEC sued Microsoft once they read the Windows NT Internals documentation, due to its similarity with VMS : https://www.techmonitor.ai/technology/dec_forced_microsoft_i...

[ssrc]

Yep, if you have in one hand "Inside Windows NT" by Helen Custer (or one of its successors, "Windows Internals"[0]) and on the other "VMS Internals and Data Structures"[1]...

[0]: https://learn.microsoft.com/en-us/sysinternals/resources/win...

[1]: https://bitsavers.org/pdf/dec/vax/vms/training/