16 STATIONERY, NAMELY BINDERS, PAPER BLOCKS AND PADS, PENS AND PENCILS, PLASTIC POCKETS, VISITING CARD FILES AND BINDERS, CALENDARS; PRINTED MATTER, NAMELY OPERATOR'S INSTRUCTION MANUALS FOR COMPUTERS, CALCULATING MACHINES, TELETYPEWRITERS, FACSIMILE TRANSMISSION UNITS AND COPYING MACHINES; INSTRUCTIONAL AND TEACHING BOOKS, PAMPHLETS, LEAFLETS, HANDBOOKS AND BROCHURES IN THE FIELD OF INFORMATION PROCESSING FOR BUSINESS AND INDUSTRY; TYPEWRITERS AND OFFICE REQUISITES, NAMELY, STAPLING MACHINES, PEN BOXES, PENCIL SHARPENERS, PERFORATORS, PAPERCLIPS, PAPER BALANCES AND STAMPS