A computer-implemented method for use in conjunction with a computing device with a touch-screen display allows users to organize and sort multimedia notecards and notebooks in an intuitive manner. 7 microns and directly producing images of the interior of the boiler, or producing feeding signals to a data processing system for information to enable a distributed control system by which the boilers are operated to operate said boilers more efficiently. Reflected signals are relayed to a fixed receiving antenna via rotating transponders.