Paul Horowitz is Professor of Physics at Harvard University, where he originated the Laboratory Electronics course in 1974, from which emerged The Art of Electronics. He was one of the pioneers of the search for intelligent life beyond the Earth, and one of the leaders behind SETI. Other research interests include observational astrophysics, x-ray and particle microscopy, and optical interferometry. He is the author of some 200 scientific articles and reports, has consulted widely for industry and government, and is the designer of numerous electronic and photographic instruments.