O'Reilly Arduino Cookbook

http://goo.gl/ca6HiZ

O'Reilly - Building Java Enterprise Applications pdf ebook

http://goo.gl/o2zIWw

Java Tutorial

http://goo.gl/9Ygx61

O'Reilly Java Server Pages pdf ebook

http://goo.gl/hqGLd6

O'Reilly Learning Java pdf ebook

http://goo.gl/955nJt

CCNA 1 Ch 6 Addressing the Network IPv4 pdf slides

This is CCNA Semester 1, Chapter 6.

 Addressing the Network IPv4 

http://goo.gl/uHvbaP

CCNA 1 Ch 5 OSI Network Layer pdf slides

This is CCNA Semester 1, Chapter 5.

OSI Network Layer

http://goo.gl/nWieqC