16 Printed matter, namely, books, brochures, folders, informational flyers, in the field of medicine, molecular biology research, agriculture and biotechnology, placards, mounted photographs, unmounted photographs, pictures, X-ray photographs and electronic images, posters and stickers, stationary writing paper and envelopes, printed instructional, educational, and teaching materials in medical and molecular biology science, plastic bags and sacks for merchandise packaging, namely, envelopes and pouches, plastic bubble packs for wrapping or packaging