This volume focuses on recent developments in the field of electronically non-adiabatic transitions which are central to a wide variety of rate processes, ranging from charge transfer collisions in the upper atmosphere and interstellar material to organic photochemistry. Work is presented in the following areas: photochemical dynamics; fine structure and charge transfer processes; surface hopping; observable consequences of geometric phase; dissociative attachment; non-adiabatic processes in biology; and application to cold atom collisions.