Could you please read https://news.ycombinator.com/newsguidelines.html and follow those rules (and more importantly, that spirit) when commenting here?
Should I change the title or something like that?
I would suggest to change the title to "topics of software engineering" at least.
Be sure, I will compliers, robotics and hardware stuff very soon.
Of course, I immediately went directly to the section on C. I noticed LibreSSL's licenses are described as "semi-free." Not trying to start any kind of flamewar at all, but I am curious what part of the ISC license makes it only semi-free, in your view? Is it just a preference for GPL?