ABSTRACT
I am not afraid to consider the fi nal question as to whether, ultimately in the great future we can arrange atoms the way we want; the very atoms, all the way down!… The principles of physics, as far as I can see, do not speak against the possibility of maneuvering things atom by atom. It is not an attempt to violate any laws… but in practice, it has not been done because we are too big… At the atomic level, we have new kind of forces and new kind of possibilities, new kind of effects.
