This chapter contains sections titled: Introduction Basic Concepts and Definitions Production of Metallic Glasses Experimental Methods for Structure Determination of Metallic Glasses and Amorphous Alloy Melts Structures of Metallic Glasses Comparison of the Structures of Metallic Glasses and Amorphous Alloy Melts. Rough Models of Metallic Glasses and Amorphous Alloy Melts Casting of Metallic Glasses. Crystallization Processes in Amorphous Alloy Melts Classification of Metallic Glasses Properties and Applications of Metallic Glasses Summary Exercises References