I love the term Runge-Kutta. It offers me what promises to be never-ending amusement. It's just so much fun to say. Runge-Kutta. Runge-Kutta. In general I am a big fan of abbreviations, but I have to make an exception here. Why would anyone want to say "rk method" when they could say "Runge-Kutta method"?
In case you are wondering, Runge-Kutta methods are a class of numerical methods used to solve ordinary differential equations.