16 Printed instructional, educational and promotional material regarding the research, industrial analysis, design and development of computer software, apparatus and instruments for weighing, measuring, signaling and checking of vibrations, sound, strain, and temperature; printed matter in the nature of signboards of paper or cardboard, advertisement boards of paper or cardboard, posters, greeting cards, pamphlets, almanacs, announcement cards, calendars, tear-off calendars, [ cardboard packaging tubes,] catalogues, [charts,] bags of paper or plastic for packaging, envelopes, pouches of paper or plastic for packaging, [ blueprints, ] booklets, books, periodicals, [ pictures, ] paper tapes and cards for the recordal of computer programmes, [ copying paper, ] book covers of paper or plastics, document files, folders for papers, printed forms, graphic representations, [ handbooks, jackets for papers, magazines, ] manuals, [ paper mats for beer glasses, ] note books, writing pads, paper sheets, stickers of paper or plastic, [ cardboard tubes, food wrappers, ] writing pads, writing paper [, plastic bubble packs for wrapping or packaging ]