"The Foundation started by using Linux and security
programmer David A. Wheeler's methodology from his 2002's
groundbreaking study, Linux: More Than a Gigabuck: Estimating
GNU/Linux's Size. The results of applying these tools to 2008's
Fedora 9 Linux came out to a total of 204,500,946 physical SLOC
(Source Lines of Code) and a cost of $10,784,484,309. But, lucky
you, you can download it for free from the Fedora Web site and you
won't need to spend a penny on it."