*[Artificial Intelligence A Modern Approach](http://51lica.com/wp-content/uploads/2012/05/Artificial-Intelligence-A-Modern-Approach-3rd-Edition.pdf)(PDF)
####Mathematics
####Mathematics
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@@ -430,6 +431,7 @@
*[Operating Systems: Three Easy Pieces](http://pages.cs.wisc.edu/~remzi/OSTEP/)(PDF)
*[Operating Systems: Three Easy Pieces](http://pages.cs.wisc.edu/~remzi/OSTEP/)(PDF)
*[Practical File System Design:The Be File System](http://www.nobius.org/~dbg/practical-file-system-design.pdf)(PDF) - Dominic Giampaolo
*[Practical File System Design:The Be File System](http://www.nobius.org/~dbg/practical-file-system-design.pdf)(PDF) - Dominic Giampaolo
*[Xv6, a simple Unix-like teaching operating system](http://pdos.csail.mit.edu/6.828/2012/xv6.html)(PDF)
*[Xv6, a simple Unix-like teaching operating system](http://pdos.csail.mit.edu/6.828/2012/xv6.html)(PDF)
*[Operating System Concepts, 8th Edition](http://elajt.info/lit/OS_8th_Edition.pdf)(PDF)