at present, there is an increasing interest in the prediction of properties of classical and new materials such as substitutional alloys, their surfaces, and metallic or semiconductor multilayers. a detailed understanding based on a microscopic, parameter-free approach is thus of the utmost importance for future developments in solid state physics and materials science. the purpose of this book is to provide this understanding. electronic structure of disordered alloys, surfaces and interfaces consists of two major parts. the first explores the theoretical background while the second is devoted to applications. researchers in solid state theory, surface science and computational materials research will benefit from the books comprehensive treatment while graduate students will find this text a suitable introduction to these topics.