Given http://news.ycombinator.com/item?id=5014230 http://news.ycombinator.com/item?id=5014230 this was the simplest intro I could find (it is quite easy to unde

Given http://news.ycombinator.com/item?id=5014230 http://news.ycombinator.com/item?id=5014230 this was the simplest intro I could find (it is quite easy to understand and not specific to Microsoft, except at the very end).