HN user
Everyone needs to write his or her notes to understand the topic, to include something that he/she feels important. Some people stress the importance of logical flow and theory, whereas some people stress the importance of applications. I believe we all learn by organising knowledge in our own way. So there won't be a single definitive reference text or note.
In Asia, M$ has a real strong support because people think that Linux and other free OSes are for geeks only. And they won't when everyone here thinks that M$ is the `standard' and won't mind locking themselves in it.
I would think that cause there is no need to be religious. I mean what's the point of believing in something which no one knows whether existed or not while life goes on as usual. I mean computers work for both who believe in something and who don't.