That's definitely true, but I meant actual university courses e.g. CLRS. Some University grade literature, mostly in CS, of STEM subjects is almost non-mathematical e.g. A. Tannenbaum's OS book/s and S. Muchnick's compiler are both mostly mathematics free.

One can find very nice, textbook quality, lecture notes for free all of the web too (http://michaelnielsen.org/blog/yang_mills.pdf for example).