http://en.wikipedia.org/wiki/John_Hopcroft
http://www.cs.cornell.edu/jeh/
_ Lec 1 | MIT 6.00 Introduction to Computer Science
http://www.youtube.com/watch?v=k6U-i4gXkLM
_ Computer Science Unplugged - The Show
http://www.youtube.com/watch?v=VpDDPWVn5-Q
