9 Electronic and downloadable electronic publications in the nature of training manuals, books, magazines and newsletters featuring lessons in the fields of business, history, literature, philosophy, mathematics, science, culture, visual arts and music; pre-recorded audio tapes, video tapes, and video discs featuring lessons in the fields of business, history, literature, philosophy, mathematics, science, culture, visual arts and music; educational software featuring instructional lessons in the fields of business, history, literature, philosophy, mathematics, science, culture, visual arts and music, and user manuals sold as a unit therewith