One question I have of computer systems in general is the inherent security of them. If I remember correctly the US Navy was using Windows NT as a platform for some sort of usage. In my opinion relying on something like Windows NT which is not auditable in source. Is a probably and definite security hole. I'm not saying that open source is the key. But I believe that at least for military usage the software and operating systems specificaly should have to go through some realistic sort of source code auditing. I realy would not like my air defense systems crashing because of a buffer overflow.