Marc D Levenson graduated from MIT in 1967, received his Ph.D. from Stanford University in 1972, and did postdoctoral work at Harvard. He later became an Associate Professor of Physics and Electrical Engineering at USC in Los Angeles before joining the IBM San Jose Research Laboratory in 1979, where he worked on laser applications in science and technology, including quantum optics. He is best known for his book, Introduction to Nonlinear Laser Spectroscopy. He left IBM in 1993 to help form Focused Research (a div. of New Focus, Inc.). Later, he held visiting positions at JILA (U. of Colorado at Boulder) and Rice University in Houston, Texas. He was Editor-in-Chief of Microlithography World Magazine, and he created M.D. Levenson Consulting. He is a Fellow of IEEE, OSA, and APS, and a member of SPIE and National Academy of Engineering. In 1976, he received OSA’s Adolph Lomb Medal for “his contributions to laser spectroscopy, especially development of the techniques of three-wave mixing and two-photon absorption without Doppler broadening.”