This module covers properties and applications of glasses and glass ceramics, their commercial importance, societal impact and emerging applications. It gives an overview on common crystal structures and their correlation with physical properties. It covers ternary phase equilibria, electronic properties, structural properties, and it defines the close relationship between processing, microstructures and final properties. The module embraces the numerous applications of ceramics/glasses ranging from ultra-high temperature nozzles to solid state batteries. The latest emerging trend are explored using updated scientific literature.