This book covers the basic electromagnetic principles and laws from the standpoint of engineering applications‎,‎ focusing on time‎-varying fields‎.‎ Numerous applications of the principles and law are given for engineering applications that are primarily drawn from digital system design and electromagnetic interference ‎(‎Electromagnetic Compatibility or EMC‎)‎‎.‎ Clock speeds of digital systems are increasingly in the GHz range as are frequencies used in modern analog communication systems‎.‎ This increasing frequency content demands that more electrical engineers understand these fundamental electromagnetic principles and laws in order to design high speed and high frequency systems that will successfully operate‎.‎