Open Source
Definition from the Wikipedia article at http://en.wikipedia.org/wiki/Open_source
"Open source describes practices in production and development that promote access to the end product's sources. Some consider it as a philosophy, and others consider it as a pragmatic methodology. Before open source became widely adopted, developers and producers used a variety of phrases to describe the concept; the term open source gained popularity with the rise of the Internet and its enabling of diverse production models, communication paths, and interactive communities.[1] Subsequently, open source software became the most prominent face of open source."