42 Design and development in the field of new industrial products and parts thereof; design and development in the field of computers and computer peripherals, adjustable height and non-adjustable height stands adapted for laptop, computer monitor and PC tablet mounts supports, keyboards, PC tablets pens with conductive points for touch screen devices and parts thereof; design and development in the field of computer software; design and development in the field of paper and cardboard; design and development in the field of office equipment, printed matter, bookbinding material, photographs, stationery, adhesives for stationery or household purposes, artists' materials, namely, paint brushes, easels, paint brushes, typewriters and office requisites; graphic design of printed instructional and teaching materials; design and development in the field of plastic material for packaging, printers' type, printing blocks, document holders; design and development in the field of furniture and furnishing, including office furniture, tables, adjustable height tables, desks, adjustable height desks, furniture for storing documents and parts thereof; design and development in the field of ergonomic furniture and furnishing office furniture, office tables, adjustable height office tables, desks, adjustable height desks, office desks, furniture for storing documents and parts thereof; design and development in the field of ergonomic office equipment stands and adjustable height stands adapted for laptop, computer monitor and PC tablet mounts supports, keyboards, PC tablets pens with conductive points for touch screen devices and parts thereof, design and development in the field of ergonomic aids for people working with a computer and/or a monitor and parts thereof; design and development in the field of computer workstation accessories, namely, ergonomic worktops also providing the possibility to use the top as a writing top, either moveable, adjustable height or not and parts thereof