[bawolff]

Its open source, you could look at git log (of course not all changes are wmf sponsored, but a significant portion are): https://gerrit.wikimedia.org/r/q/status:merged

There is also a short weekly news letter of more breaking changes https://meta.wikimedia.org/wiki/Tech/News

And of course, they also publish annual reports, although those tend to be a bit more pr-ish.

p.s. i'm not sure what you mean by semantic context? Do you mean structured data/semantic web type stuff, or do you mean some sort of thing that tries to add context to articles you are reading, or something else?

[achn]

Appreciate the links. They should include more factuals and vision in their fundraising copy.

All of those are great options for context, but I specifically would like to see logic/math/physics/code with functional context for symbology, usage, and derivation.