Amazon Web Services clearly dominates the field. One of the first clouds, AWS is today’s leading choice for good reason. It offers so many options and services under its virtual roof that it’s nearly impossible to summarize the breadth. There are dozens of machine types to choose from, dozens of ways to store data, and hundreds if not thousands of software packages you can use to build out your environment. That’s the definition of the 800-pound gorilla in the cloud.
InfoWorld Cloud Computing