16 PERIODICALY PUBLISHED JOURNALS MAGZINES AND NEWSLETTERS
41 EDUCATIONAL SERVICES, NAMELY, CONDUCTING LECTURES, SEMINARS AND CONFERENCES IN THE FIELDS OF OPTICS AND PHOTONICS AND AWARDING EDUCATION GRANTS TO OTHERS FOR STUDY AND RESEARCH IN THE FIELDS OF OPTICS AND PHOTONICS
42 ASSOCIATION SERVICES, NAMELY, PROMOTING THE GENERAL INTEREST OF THOSE CONCERNED WITH THE FIELDS OF OPTICS AND PHOTONICS