Τhe course provides an introduction to material science and engineering. Subjects include: electronic structure, bonds between atoms, connection of type of bonding and material properties, introduction to crystalline and amorphous materials, point defects and doping of materials, introduction to microscopy, diffusion mechanisms and their connection with processing and applications. The course presents the basic categories of materials with emphasis in their electrical and optical properties: The students are taught the circle of choice of materials for advanced applications (Structure/Properties/Processing/Applications).