Any type of operating system that I wanted to be able to hack, I basically compromised the source code, copied it over to the university because I didn't have enough space on my 200 megabyte hard drive.

In television you go in with this operating system that it is a crapshoot.

It's something any operating system vendor has to have.

This is true regardless of the operating system being used. It is a universal vulnerability.

My hacking involved pretty much exploring computer systems and obtaining access to the source code of telecommunication systems and computer operating systems, because my goal was to learn all I can about security vulnerabilities within these systems.

There is no neat distinction between operating system software and the software that runs on top of it.