Link for the lazy: http://research.microsoft.com/en-us/um/people/simonpj/papers/marktoberdorf/mark.pdf http://research.microsoft.com/en-us/um/people/simonpj/pa

Link for the lazy: http://research.microsoft.com/en-us/um/people/simonpj/papers/marktoberdorf/mark.pdf http://research.microsoft.com/en-us/um/people/simonpj/papers... It's a good bit of writing, that.