Well, where do I start? What I want to do is modify existing programs- it that possible? Do I need a program to complie code or it it just a matter of accessing commands in the terminal? I'm currently on 10.3.9 if that makes a difference. I used to write BASIC programs on my Apple2+, learned some FORTRAN in college, and used to do the simple HTML stuff. A college class would be a good place to start, but I just want to have some fun on my own.