To provide an optical recording medium and the like that is adapted to higher density and higher speed recording of 8 times or more than that of DVD and that exhibits superior repeating and reservation properties. Two side blocks are longitudinally located on two sides of the window. In another embodiment, an optic cable suitable for down hole oil field applications comprise one or more optical fibers disposed in a polymer tube having fins extending therefrom. A third pair of arms are hinged to a third member and to the mobile member, forming a third four-bar linkage. The reading device contains a circuit component for detecting a modulation of an electromagnetic field caused by the transponder as well as a circuit component for generating a signal corresponding to the modulation and transmitting the signal to the interface of the furniture system.