This is from one of my college professors, nice to see it make it on HN, and it looks like there's a bit more material since I used it in class. I found it help

This is from one of my college professors, nice to see it make it on HN, and it looks like there's a bit more material since I used it in class. I found it helpful in explaining basic concepts (more-so than the bland textbook that I had to pay for).