This book is woven around theory, models, solution methods and simulation techniques evolved for several versions of EMTP for over nearly five decades. However, the focus is on one particular version – microtran, which is from the University of British Columbia (ubc). being more than a first level reference, this book does not address topics found in common text books on power system transients. The focus in this book is modeling and simulation algorithms for digital simulation and computation much like emphasis laid in text books for computer-aided load flow, fault and stability studies.