Scientific, apparatus and instruments incorporating displays and display devises, optical and nautical apparatus and instruments; data, sound and image processing equipment; apparatus and instruments for production, broadcasting, transmission, presentation and display of data, images, graphics, animated images, sound and like information; infra-red and ultra-violet display apparatus; image processing apparatus and instruments; data communication apparatus and instruments; projection apparatus, holographic projection apparatus, projection screen, remote control devices; audio-visual teaching apparatus; computers, laptop computers, computer monitors; display monitors; cameras, camcorders; photographic apparatus and instruments; intercommunication apparatus; phototelegraphy apparatus and instruments; calculators; telecommunications and telephonic apparatus and instruments, mobile and fixed telephones, video-telephones, video-recorders, video-screens; electronic notice boards, electronic pens with visual display units, electronic pocket translators; microcomputers adapted for use in playing games; television game and video game apparatus; amusement apparatus adapted for use with television receivers, video games; electronic games adapted for use with television receivers; printers for use with computers