When the open source community use the word free they mean freedom; the freedom to use software in any way that you want, the freedom to alter it and the freedom to give it away. Audio courtesy of Christian Einfeldt and crew of the Digital Tipping Point project, under a http://creativecommons.org/licenses/by-nc-sa/3.0/.  Richard Stallman must be quoted in entire sentences only.

Transcript -- Linux - Origins

The Linux Operating System is 20 years old. This podcast series, presented by the Senior Lecturer in Computing at The Open University, Blaine Price, tells the story of an extraordinary operating system that in two short decades has grown from a students’ project to the foundation of the internet. Linux runs on everything from your wireless router and Android Smartphone to CERN's most powerful computer. It has championed a whole new philosophy of collaboration and freedom in the software development community. We will hear from its users, its innovators and its originators. This is the story of Linux. For an entry level approach to learning Linux, try The Open University course T155 Linux: an introduction.