Updated> Grid, Distributed and Cloud Computing Resources Primer
http://www.zillman.us/white-papers/grid-distributed-and-cloud-computing-resources-primer/

I am very pleased to announce that I have just updated my Grid, Distributed and Cloud Computing Resources Primer. This primer is now 29 pages and a .pdf document (249KB) and freely available from the above URL. The primer gives an excellent overview of Cloud Computing along with a comprehensive listing of cloud, grid and distributed computing resources! It will be permanently archived in my White Papers site. [Completely Updated, Reviewed and Link Validated on September 10, 2013]