Apparatus for measuring and supervising; data processing equipment and software

Electric, photographic, cinematographic, optical, signalling and teaching apparatus and instruments; luminous and mechanical signs and signals; fluorescent screens; neon signs; projection apparatus and screens; illuminated notice boards, screens and signs; notice boards, screens and signs which illuminate information entered on a glass or acrylic surface; illuminated or luminous notice boards, screens and signs incorporating a surface to display information entered by felt-tipped pen, crayon or similar writing instrument