"Systems Engineering" is the art and science of creating systems - self-evidently, from the title. But is there more to it than that? In practice, systems engineering creates viable turnkey systems, i.e., complete systems with the facilities to maintain and sustain themselves. Planetary rovers and explorers are just such viable systems, as may be robots and automatons; but everyday “products" may be 'viable systems,' too. Would you buy a car that could not be refuelled, repaired and maintained? So, in providing the car, the manufacturer also provides the facilities needed to maintain and repair it. And the “viable system,” then, is the car plus its support facilities – without which it would not continue to operate. So, there may be more to viable systems than at first meets the eye...