Interconnected

It's instructive to see how their UI is maturing: Microsoft Inductive User Interface Guidelines. Giving thought to the tense of a title doesn't matter enormously just done once, but the effects of a consistant voice across an entire OS are tremendous. (As is familiarity, as in "IUI is an extension of the common Web-style interface"). [via Nooface, where you can also find additional IUI links.]