The art of time domain (TD) computational electromagnetics has grown significantly in the last decade, primarily due to the availability of highly powerful computer resources. However, there has so far been a lack of suitable literature on time domain computational techniques for solving transient electromagnetic problems via differential and integral equations. Consequently, the motivation for producing on this book arose from the need to fill the existing gap with a text on TD computational techniques that would cover major techniques widely used within the electromagnetic community. This is one of the rare books that covers both differential and integral equation methods in the time domain, and explores the state of the art in the field of TD numerical modelling of high frequency (HF) and transient electromagnetic phenomena.