What is cloud computing, and why is its increased use getting so much attention? In my view, cloud computing is just the latest iteration of what started back in the days of the IBM service bureaus of the 1960s and '70s. Back then, only a handful of organizations had the resources to own and operate IBM mainframe computers. Those that did eventually realized they were only using a fraction of these computers' capacity; and so, they came up with a novel approach - rent computing time to other organizations that couldn't afford to own a mainframe themselves but could take advantage of the computing power they offered. This was easily done given the security model and ability to partition memory and processing built into the mainframe. Voila! Cloud computing was born!