"We’re directly integrating equations of motion into model globular cluster dynamics," Dottie said smoothly. "We’ve had n-body codes since the sixties, but we broke loose by an order of magnitude up here. These GRAPE cards do a hundred teraflops. I’ve got the rest of the system modeling stellar evolution and mass transfer. Oh, and collision models. If we get a cluster core collapse, then the collision model really gets hairy."