Adds a practical paper by Simon Peyton Jones on tacklin monadic I/O, concurrency and foreign-language calls in Haskell. Published in 2010 by Microsoft Research. This is a very readable and useful paper for anyone learning Haskell and intersted in using it beyond academia.

haskell/README.md

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+# Haskell
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+* [Tackling the Awkward Squad: monadic input/output, concurrency, exceptions, andforeign-language calls in Haskell](http://research.microsoft.com/en-us/um/people/simonpj/papers/marktoberdorf/mark.pdf) by Simon Peyton Jones