I belive the best OS ever is...
Cosmos...I believe it is called.
Read up on you OS(pl) and you will find it mentioned about 2 months ago. It is the OS for almost all Military Spy Satilites. The code reportedly was stolen from a server and copied. After that I have heard absolutly nothing on it. Some form of state secret.

I would love to be able to use it but I guess that would require me to join the military. Only problem with that is I don't like green and I hate hair cuts.