| | answering machine; beeper, pager; defibrillator; display; display adapter, display adaptor; dongle; doubler; generator; hearing aid, deaf-aid; logic element; mouse, computer mouse; multiplexer; pacemaker, artificial pacemaker; personal digital assistant, PDA, personal organizer, personal organiser, organizer, organiser; repeater; scanner, digital scanner, image scanner; system clock; trackball; tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve |