Provides engineers and scientists with a quick reference for special functions that are crucial to resolving modern engineering and physics problems. The functions examined apply to many fields, including electro-optics, electromagnetic theory, wave propagation, heat conduction, quantum mechanics, probability theory, and electric circuit theory. A brief review of these important topics is included in this guide, as well as an introduction to some useful engineering functions such as the step function, rectangle function, and delta (impulse)