Microsoft's Other OS

Microsoft's Other OS: "Microsoft Research has developed a prototype of a microkernel operating system, code-named 'Singularity.' Its most surprising feature: It has nothing to do with Windows.
Contrary to popular opinion, Windows isn't the only operating system in which Microsoft is investing.
The Microsoft Research team has built from scratch a 300,000-line, microkernel-based operating system (OS) that has no roots in Windows."