OpenBSD is a FREE/secure operating system that is based on Berkeley's implementation of Unix. It's not Linux, but it is like Linux in that it is based on Unix. It falls into the category of "*nix." But, it is very different from Linux. Linux has become a very easy to install, somewhat easy to configure and use Unix-like operating system. It works with a vast array of hardware and software and has world-wide support. OpenBSD focuses on security and stability. If you are interested in using OpenBSD, read man pages, search Google and ask questions OpenBSD mailing lists.