This might have been asked before but I was not able to find it. I have used red hat, mandrake, slackware, freebsd, and openbsd. What I would like to know what is the major difference between the different OS's. I know some are more secure and come with different packages. I also know that the kernel is modded differently in each one. BTW: I do know that freebsd and openbsd are not linux. So what actually makes them completely different from each other?