9 PRERECORDED VIDEO TAPES, COMPACT DISCS, FLOPPY DISCS, LASER DISCS, CD INTERACTIVE, DIGITAL VIDEO DISCS, DIGITAL AUDIO TAPES, OPTICAL DISCS, AND OTHER DIGITAL RECORDING MEDIA USED FOR TEACHING AND INSTRUCTIONAL PURPOSES IN THE FIELD OF DENTISTRY AND ORAL MEDICINE; ELECTRONIC DATABASES OF INFORMATION USED FOR TEACHING AND INSTRUCTIONAL PURPOSES IN THE FIELD OF DENTISTRY AND ORAL MEDICINE, RECORDED ON DIGITAL RECORDING MEDIA