Open Source - This term will generally be used in two contexts: 1. The marketing phrase for free software 2. Development methodology Open source is not a license. It provides a common set of specifications to which licenses must adhere to be considered open source. Fink, M. (2003). The Business of Linux and Open Source. In _The Business and Economics of Linux and Open Source_ (pp. 6–6). essay, Prentice Hall PTR.