Having One's Head in the Cloud

This paper talks about the cloud computing that had come full circle toward logically centralised administrative domains and shared computational resources. Distributed computing, cluster computing, grid computing, and cloud computing are all terms that have developed over the past few years. Each is distinct from the others in some ways, but there's a great deal of overlap. A turn-of-the-century distributed computing application that has the right profile could easily have morphed through the series, proudly calling itself a cloud computing application today.