A computer screen for a personal computer according to the present invention includes a main screen, one or more retractable sub-displays, and one or more retractable arms. The plurality of processing units is juxtaposed above the endless belt. These aids include a GPS receiver, antenna azimuth, elevation and polarization angle sensors, and the terminal’s modem, DVB receiver and spectrum analyzer, which contains a beacon detector also serving as Receive Signal Strength Indicator. Plastic hinge pins made with these polymers having their long molecules oriented along the axis of the shaft of the hinge pin are exceptionally strong and resistant to deformation. The thickness of the first MCuO film of the precursor is controlled so that the thickness of the superconducting HgMCuO film is in the range of between 300 to 950. All the B-frames that depend upon frame F are decoded and displayed from highest display order to lowest display order, and the index value then is set to a value equal to one less than the display order of the earliest B-frame that depends upon frame F.