I'm afraid that KOS-MOS' exact specifications are classified - at least the core of her program. You see, her OS was initially created by .... by a dear friend of mine, and much of her system is encrypted. Her body is based on mechanical parts, though considering the silicon and carbon base bodies of Realians, I suppose there are those who consider her structure obsolete. Her OS is learning program, with an advanced personality simulation to communicate better with those she's working with.