Mark Russinovich's Inside Windows Vista User Account Control includes many interesting tidbits for those like me who develop for Microsoft Windows, but to me Windows Vista Integrity Levels are DoD-style Multi-Level Security by another name.
This is ironic, as the Department of Defense seems to be moving away from MLS systems, instead going towards PCs where each PC is at one level of security. (DoD developers, feel free to speak up at this point.)
Worth a look for Windows developers and OS enthusiasts.
