The Seismic Analysis Code (SAC) is one of the most widely used analysis packages for regional and teleseismic seismic data. The book leads new users of SAC through the steps of learning basic commands, describes the SAC processing philosophy and presents its macro language in full. Methodical and authorative, this combined introduction and advanced tutorial guide is a key resource for researchers and graduate students in global seismology, earthquake seismology and geophysics.