Sorry to ask such a basic question. I thought it would be easy to do this, but I really can't find an explicit policy on acceptable subjects for MSE.
If there's no such explicitly written-out policy, then I would like to know about the acceptability of asking about
the history of Mathematica, and in particular, the history/genealogy of the Wolfram language (i.e. where would it fit in the genealogy of programming languages);
getting help locating specific Mathematica-related items in the WRI site.
I would have thought that both these types of questions are well within MSE's scope, but since can't find any tags for them, I'm not so sure anymore (maybe the tags don't exist simply because no one has yet wanted to ask such questions?)