16 Paper, cardboard and goods made from these materials, namely, writing paper, cardboard boxes and computer paper; printed matter, namely, paper signs, books, manuals, curricula, newsletters, informational cards and brochures in the field of commercial office equipment, writing paper, envelopes; postage stamps, leaflets and magazines in the field of commercial office equipment; greeting cards and picture postcards; photographs; pamphlets, catalogues, user manuals in the field of commercial office equipment; printed forms; printed advertising material, namely, advertising signs of paper; stickers, posters, note cards, greeting cards, invitation and announcement cards, pictures, writing paper, memo pads, note pads, diaries, photo albums, photograph albums, calendars, sketch books, drawing books, colouring books; books, periodicals and magazines in the field of commercial office equipment; office requisites except furniture, namely, stamps, ink pads and ink therefor, letter-openers, folders for papers, office notepads, office perforators, staplers, drawing rulers, pencil-sharpeners, elastic bands, paper clips and staples