This text has been developed to provide students with more background for the applications of elecricity and magnetism particularly in optics and topics related to research instrumentation. For example, waveguides (both conducting and dielectric) are discussed more thoroughly than in most texts because they are an important laboratory tool and important components of modern communications. The text, therefore, modernizes the topics covered in a typical electricity and magnetism text. Because this approach requires an understanding of the mathematics relevant to the topics, the text includes a much more thorough discussion of the mathematics of electricity and magnetism than found in current texts. It provides a solid background for students who need knowledge of electricity and magnetism, particularly physics majors.