The interpretation of quantum mechanics in this book is distinguished from other existing interpretations in that it is systematically derived from empirical facts by means of logical considerations as well as methods in the spirit of analytical philosophy, in particular operational semantics. The new interpretations, using a two-model approach overcomes the well-known conceptional problems and paradoxes of "orthodox" quantum theory. This interdisciplinary book should be of interest to scholars, teachers, and students in the fields of physics and philosophy of science.