"[[Information theory|[I]nformation.]].. does enter into physics and has been in physics for a long time, in the most obvious way with ... [which] is able to use information about the motions of molecules to operate a shutter mechanism and put all the fast-moving ones on the left and the slow-moving ones on the right, thus establishing a temperature difference from which work can be extracted. You can run a heat engine, lift a weight [etc.]"