Many folks in the early stages of open source evaluation think "Linux," which originally created a lot of the open source buzz. In reality, open source has expanded into just about every aspect of IT and software development you can imagine. It is even becoming a major part of commercial software according to Gartner who predicts "...by 2012, 80% of all commercial software will include elements of open-source technology."
But despite its breadth, there is a tendency to lump "open source" into an initiative that does not fully take into account the different groups involved with it. It's a simple idea, but when discussing open source adoption, it's worth considering two perspectives present in any IT organization that develops portions of its own solutions.