What's cool about Linux is that its kernel allows it to be installed on almost any OS. Even smaller "OS" systems will contain Linux because it doesn't have such a large mainframe to work with. Plus it's very easy on the memory.

OS X is run off of a Linux kernel essentially. Which is another reason why Macs are very secure. There are other reasons too, but that's beside the point. Another thing to point out about Linux is that it's mostly "geeky" such as using command lines. It does have a GUI, but Linux has much more flexibility with its command line than Windows XP. Of course that's because Windows isn't a full DOS anymore since it came out of 3.1.

Ahh the memories