Here are entered works on electric generators, motors, transducers, sensing instruments, microphones, and similar devices, which convert electrical energy into mechanical energy, or the reverse, and which normally function as components of larger systems, e.g. electric power systems, information systems, control systems, etc.
Here are entered works on extracorporeal pumping mechanisms that duplicate the function of the natural heart. Works on intracorporeal pumping mechanisms that duplicate the function of the natural heart are entered under Heart, Artificial.