Within the Program the work on characterization of properties of materials was carried out over a very large part of electromagnetic spectrum. By knowing the structural and physical properties of all the constituents, the optical response of a material can be predicted. With the much increased demands of modern technologies for complex coatings of well defined properties, there is an almost unlimited need for engineering coatings to meet such demands. Standard methods which have been in use so far are often not adequate to solve the problem of producing coatings of precisely defined properties. Regarding this, we are confident that our work is of much relevance for the future development in this field of the science of materials. The publications published in international journals on our results achieved within this Program show that the direction of the Program was right and scientifically very important.