In 2001, Laing and Coleman examined several NASA Goddard Space Flight Center applications (rocket science) with the express intention of finding “a way to produce cheaper and higher quality software.”3 They examined three applications of varying quality, one of which had 1,617 classes and more than 500,000 lines of code.
This doesn’t seem very large for an enterprise application and I'd imagine in a verbose language (think C++, Java) the LOC/class isn't bad either.
