Video on demand's a type of video or movie service which allows the viewer to access the media immediately upon subscription, such as streaming Internet or pay-per-view television offerings. On-demand computing may also be referred to as Utility computing, and most frequently refers to a type of computing service where the actual software's presented to the user, once a subscription to the service's successfully processed. In a typical "on-demand" computing model, the software isn't actually… (More on On-demand)