Collects the lectures presented at the May 1994 NATO ASI. The topics covered can be placed into three general groups: fundamental principles of core level spectroscopies; basic aspects of magnetic phenomena; and applications of the spectroscopies to magnetism. In all three groups, theoretical interpretations as well as experimental measurements are presented, often covered in a single lecture or series of lectures. Among the specific topics are photoemission and ferromagnetism; spin-resolved core level photoemission spectroscopy; and spin resolved soft x-ray appearance potential spectroscopy. Annotation c. by Book News, Inc., Portland, Or.