independent study topic suggestions

[4y64izwU]

I'm sorry I know this doesn't have to do general c++ programming. I'm a undergrad junior and I'm planning on doing independent study next semester for computer science. I wanted to do on finite automata, but it is already taught in computer theory, so I need to do a topic which is not taught in my college. Please suggest me topics which are not too complicated and broad, I would greatly appreciate it. Please!!!!