Brought together and put out. That's output. A gathering, a tree, its nuts. An end in them selves or a means to more of the same. Propagation does not always demand its toll; apples are separable from both their progenitors and their seeds. Thus measures of economy, of utility, are relative futility: once made, again produced, the question of whether the ocean moves as a wave or if its particles merely as with photons move up and down and onto the grains of the sand-strewn shore.