Technical consultancy (services of engineers) in the field of the use of machines, apparatus and instruments for electronics, micro-lithography, semi-conductors, integrated circuits, magnetic domain memory and integrated optical systems; design, maintenance and development of software for electronics, micro-lithography, semi-conductors, integrated circuits, magnetic domain memory and integrated optical systems, and for the design, testing and manufacture of photo-lithographic masks; consultancy in relation to the aforementioned services