MP3 DIGITAL AUDIO FORMAT PLAYERS AND RECORDERS; PORTABLE DIGITAL AUDIO PLAYERS AND RECORDERS; MOBILE DATA APPARATUS NAMELY, PORTABLE ELECTRONIC DEVICES FOR USE IN STORING DATA; PORTABLE RADIOS; COMPUTER INTERFACE DEVICES; COMPUTER INTERFACE UNITS; COMPUTER INTERFACES; COMPUTER PERIPHERAL DEVICES; DIGITIZERS; MOBILE RADIO RECEIVING APPARATUS; PORTABLE RADIO COMMUNICATIONS RECEIVERS; PORTABLE RECEIVERS; RADIO RECEIVERS; RADIO RECEIVING SETS; RADIO RECEIVING TUNERS; RADIO FREQUENCY RECEIVERS; ST...