"In Nov. 2003, ASTRÉE was able to prove completely automatically the absence of any RTE in the primary flight control software of the Airbus A340 fly-by-wire system, a program of 132,000 lines of C. [...] From Jan. 2004 on, ASTRÉE was extended to analyze the electric flight control codes then in development and test for the A380 series."
Go&learn C++. It blows my mind how often people confuse C++ with "C with classes" in 2008. Granted, C++ isn't as sexy as OCaml, but it's still C plus some rather nice extentions that (finally) got trully portable and work as advertised.
Powerful templates plus multiple inheritance give you a very impressive weapon to play with. C# and Java don't even come close.
And please... 99% of software on Windows, Mac OS X and Linux are built using the same stuff: C/C++/ObjectiveC.