BSD is good, very stable but it's best used for servers and power users. QNX has been designed specially for embeded systems and critical tasks such as power plants and hospitals, where a system must keep on working at all costs. A problem only crashes a specific part of the QNX kernel, and the rest of the system continues working while the afflicted part of the kernel restarts, which makes QNX an extremely stable system.
Now, I really don't see why one would even need Microsoft Windows in a power plant, other than for office work.
[ August 20, 2003: Message edited by: Laukev 7.5 ]