In 1991, a 20-year old Linus Torvalds, a thin, bespectacled, Swedish- speaking Finnish computer science student sends a posting to an Internet newsgroup asking for advice on how to make a better operating system. His project is a hobby, he says, and would never become big and professional'. But in ten years he and his loose alliance of hackers all over the world creates an operating system – Linux – that challenges Windows 2000 for the server market and is now poised to dominate the next generation of handheld and desktop computers. What makes Linux different, and deeply troubling for traditional software companies, is that no one owns it. Every user is free to adapt it in any way they wish, as long as they pass it on to others on the same terms