eng Science and Education Publishing Journal of Computer Sciences and Applications 2328-725X 2014-12-25 2 3 40 43 10.12691/jcsa-2-3-1 JCSA2014231 article Awodele Oludele 1 Emmanuel C. Ogu ecoxd1@yahoo.com 1 Kuyoro 'Shade 1 Umezuruike Chinecherem 1 Department of Computer Science and Information Technology, School of Computing and Engineering Sciences, Babcock University, Ilisan-Remo, Ogun State. Nigeria Cloud computing, the technology that makes it possible for computing resources to be provisioned to clients / subscribers over long distances, as well as its component technology - virtualization, which makes it possible for multiple guest systems to co-reside on a single host machine and share the computing resources of the host, have both become very popular technologies that have witnessed giant improvements in the 21st century. This is a review paper that presents an overview of the technologies of virtualization and cloud computing, tracing their history and evolution down a timeline to what they have today, and providing pointers to prospects of future advancements to virtualization and cloud computing. http://pubs.sciepub.com/jcsa/2/3/1/jcsa-2-3-1.pdf virtualization cloud computing computing resources clients / subscribers