What is Open Source?

s390 writes "The Inquirer is running an article by Olliance about "What is Open Source?" It appears to be the first of a two-part series for managers about how to engage with the open source community. The writers seem to know their material. Are they on target or have they missed something important? Do PHBs really need to read this sort of introduction to get comfortable with the idea of using Linux and other open source software?"