Apparatus for use in digital communication; apparatus and equipment for digital data transmission; Audio and video receivers; Apparatus for recording, transmission or reproduction of sound or images; Remote control apparatus; Remote control apparatus for use with televisions and other sound and image equipment; Data processing apparatus; Computers; Computer software including computer software for application and database integration; Electronic display screens; Projection screens; Fluorescent screens; Electric converters; Projectors; Video projectors; Television sets; Slide projectors; Picture projectors; LCD projectors; Multimedia projectors; Speakers (audio equipment) and other audio equipment; Chargers for electric batteries; Light emitting diodes (LEDs)