This course explains basic principles and possible applications of spin physics in semiconductors and metals, a field often referred to as “spintronics.” The course will begin by explaining various spin-related phenomena in atomic and solid state physics. Included here will be a description of optical phenomena such as optical spin orientation and detection methods and hyperfine interactions resulting from nuclear magnetic fields. Spin interactions in two-dimensional semiconductor structures will be studied as well. The course will then explore electrical spin-related effects starting with an overview of spin resonance before investigating the anomalous Hall effect and the spin Hall effect with a focus on phenomenology and microscopic mechanisms before completing with a review of experimental results and implications for applications.