I had to learn all that stuff, and it has been nearly 20 years since I took many of those classes. Except for the database design, which I use regularly, I've f

I had to learn all that stuff, and it has been nearly 20 years since I took many of those classes. Except for the database design, which I use regularly, I've forgotten it all. Which is really frustrating, because I put a lot of time, effort and money into learning that stuff. The other day one of our network guys asked me what a Red-Black Tree is. I couldn't explain it. I got an A in my algorithms and data structures class, but I haven't used it so I forgot it.