"Cooperation is probably the last thing you think of when
considering GNU/Linux and Microsoft Windows, but that's exactly
what you get with the coLinux kernel. Not convinced? Skip ahead to
'Advantages of coLinux.'
"coLinux is a port of the Linux operating system that executes
as a single process in the Microsoft operating system. The
operating systems cooperate with each other by giving each other
the central processing unit (CPU)..."