9 Electrical and scientific apparatus, namely, pre-recorded audio, visual and audio-visual electronic devices comprising diskettes and CD-ROMs used to access electronic information in the fields of science, mathematics, engineering and computer science
16 Prints and publications, namely, publications in the nature of books, magazines, journals, newsletters, manuals, brochures and pamphlets in the fields of science, mathematics, engineering and computer science
42 computer assisted research services in the fields of science, mathematics, engineering and computer science, namely, providing an on-line computer database in the fields of science, mathematics, engineering and computer science