Update free-books.md

2017-03-28 07:18:42 -03:00 · 2017-03-28 07:18:42 -03:00 · 62cb5c42ce
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 ### Computer Architecture

 ### Operating Systems
+Name | Author(s)
 :-- | :--: 
 [Operating Systems: Three Easy Pieces](http://pages.cs.wisc.edu/~remzi/OSTEP/) |Remzi H. Arpaci-Dusseau, Andrea C. Arpaci-Dusseau