The Seismic Analysis Code ‎(‎SAC‎)‎ is one of the most widely used analysis packages for regional and teleseismic seismic data‎.‎ For the first time‎,‎ this book provides users at introductory and advanced levels with a complete guide to SAC‎.‎ It leads new users of SAC through the steps of learning basic commands‎,‎ describes the SAC processing philosophy‎,‎ and presents its macro language in full‎,‎ supported throughout with example inputs and outputs from SAC‎.‎ For more experienced practitioners‎,‎ the book describes SAC‎'‎s many hidden features‎,‎ including advanced graphics aspects‎,‎ its file structure‎,‎ how to write independent programs to access and create files‎,‎ and much more‎.‎ Tutorial exercises engage users with newly acquired skills‎,‎ providing data and code to implement the standard methods of teleseismic shear‎-wave splitting and receiver function analysis‎.‎ Methodical and authoritative‎,‎ this is a key resource for researchers and graduate students in global seismology‎,‎ earthquake seismology and geophysics‎.‎