For a much lighter read, the SEP article is only around 30 pages long: <a href="http:&#x2F;&#x2F;plato.stanford.edu&#x2F;entries&#x2F;computer-science&#x2F;" rel="nofollow">http:&#x2F;&#x2F;plato.stanford.edu&#x2F;entries&#x2F;computer-science&#x2F;</a>