Spin Orbit Coupling Effects in Two Dimensional Electron and Hole Systems Spin orbit coupling makes the spin degree of freedom respond to its orbital environment. In solids this yields such intriguing phenomena as a spin splitting of electron states in inversion asymmetric systems even at zero magnetic field and a Zeeman splitting that is significantly enhanced in magnitude over that for free electrons. This book describes spin orbit coupling effects in quasi two dimensional electron and hole systems. The first part provides a general introduction to the electronic structure of quasi two dimensional systems with a particular focus on group theoretical methods. The main part of the monograph is devoted to spin orbit coupling phenomena at zero and nonzero magnetic fields. Throughout the book the main focus is on a thorough discussion of the physical ideas and a detailed interpretation of the results. Accurate numerical calculations are complemented by simple and transparent analytical models that capture the important physics