Here’s a challenge: Go to any enterprise software vendor’s Web site and try not to find a reference to the terms “Cloud” or “Software as a Service” (SaaS). These terms have become so pervasive that they are almost indistinguishable from the software itself.

A surprising number of applications are marketed and sold as Software as a Service, but in reality, they are hosted or “on-demand” versions of an application that may have been built many years ago.…