When I hear statements like 2 million lines of code, I ask myself whether this is actual code that a team of developers wrote or if they're counting the lines in third party packages and frameworks they are using. LOC is not an accurate measurement of the quality of a software application. Interestingly it seems that it is written in the Ada programming language as well (a favourite amongst mission critical software applications and military purposes): <a href="http://en.wikipedia.org/wiki/Ada_%28programming_language%29" rel="nofollow">http://en.wikipedia.org/wiki/Ada_%28programming_language%29</a>