Computer keyboards; wireless keyboards; touch-sensitive input devices for computer; fingerprint readers; computer mouses; computer input-output recorders; mouse pads; pen tablets for computers; trackballs; wireless mouses available to receive power and computer signals by electromagnetic induction; personal multimedia players; MP3 players; audio recorders/players; radios; digital voice recorders; flash memories; data storage carriers; digital video cameras; web cameras; web cameras embedded with microphones; headphones; loudspeakers; sound boxes; amplifiers; earphones attached with microphones; digital television signal receivers