Downloadable image files; geiger counters; cyclotrons; industrial X-ray apparatus; industrial betatrons; echo sounders; ultrasonic flaw detectors; ultrasonic sensors; electron microscopes; metronomes; electronic circuits and CD-ROMs recorded with automatic performance programs for electronic musical instruments; electric and electronic effects units for musical instruments; phonograph records; downloadable music files; electronic circuits and CD-ROMs recorded with programs for hand-held games...