Telecommunication devices and apparatus; video frequency devices and apparatus; audio frequency devices and apparatus; personal stereos; amplifiers; stereo receivers; radio tuners; stereo tuners; digital broadcasting receiving tuners; television receivers; audio and video receivers; audio and video receivers via digital communication networks; audio and video players via digital communication networks; optical disc players and recorders; audio cassette players; audio cassette recorders; video cassette-players; video cassette recorders; portable digital audio and video players; cases for portable digital audio and video players; stands for portable audio and video players with data communication and charging functions for AV equipment; memory card recorders for recording of audio or images; record players; phono equalizers; car stereos; video recorders, video players, audio recorders, and audio players with built-in hard disk drives; video projectors; video projector screens; video display apparatus; audio and video signal analog-to-digital converters; loudspeakers; megaphones; audio speakers; cabinets for loudspeakers; speaker mounting brackets; speaker mounting stands; headphones; earphones; horns for loudspeakers; speaker systems; microphones; audio and video signal processing apparatus; portable radio communication machines and apparatus; mobile phones; sound and video recording carriers; personal digital assistants; blank data media; blank magnetic cards, discs, tapes and data medias; cabinets adapted for AV equipment and computers; insulators for AV equipment and computers; remote control apparatus; remote controllers for audio and video apparatus and computers; digital radio transceivers; electronic machines, apparatus and their parts; computers and computer peripheral apparatus; portable computers; laptop computers; interfaces for computers; computer keyboards; computer mouse; monitors for computers; sound cards for computers; video circuit boards for computers; speakers for computers; radio tuners for computers; optical disk drives; hard disk drives; semi-conductor memories; blank USB flash drives; flash memory cards; computer servers for audio and video via digital communication network; computer software; computer software for recording, transmission, reproduction, receiving, downloading, storage and editing of sound and images; computer software for transmitting and receiving e-mails and other information; computer software, recorded; routers for telecommunication and computer network; computer network hubs; modems; printers; phonograph records featuring music; downloadable music files; sound or images recorded magnetic cards, sheets, tapes, and optical discs; exposed cinematographic films; exposed slide film; slide-film mounts; downloadable video files; recorded video discs and video tapes; power supply devices; battery for computers; cables for AV equipment and computers