An interesting post linked on
OS news:
JLOUIS Ramblings - Getting 2.5 Megalines of code to behaveI cannot help but speculate on how the software on the Curiosity rover has been constructed. We know that most of the code is written in C and that it comprises 2.5 Megalines of code, roughly[1]. One may wonder why it is possible to write such a complex system and have it work. This is the Erlang programmers view.