https://github.com/davepinch/pinchy.cc/blob/master/content/topics/works/h/henry-woldmar-ruoff/universal-manual-of-ready-reference/shakespeare-and-his-friends.md
The real reason that the first version of Windows NT was called 3.1 (liam-on-linux.dreamwidth.org) First release of NT was, logically, 1.0. But it wasn’t called that. It was called 3.1. Why?