[sixcorners]

Didn't Microsoft make an experimental kernel with managed code?

[reginaldo]

Indeed. It is the Singularity Research OS. Links: http://en.wikipedia.org/wiki/Singularity_(operating_system)

http://research.microsoft.com/en-us/projects/singularity/

[zobzu]

Note that managed code is just one feature of Singularity. They have many other important concepts (like SIPs).

Plan9 ain't bad either. There's also different C# clones (that aren't based on Singularity)

[zurn]

I wonder if SIPs are new or did eg the various Java OSes or the Burroughs ALGOL based system do something similar?

[jstclair]

IIRC, though you write in a managed language, it's jitted at install time so it doesn't run under a managed runtime.