If you found this PDF interesting then also read this 2009 article from  John C. Dvorak <a href="http:&#x2F;&#x2F;www.pcmag.com&#x2F;article2&#x2F;0,2817,2339629,00.asp" rel="nofollow">http:&#x2F;&#x2F;www.pcmag.com&#x2F;article2&#x2F;0,2817,2339629,00.asp</a>