Irmgard Flügge-Lotz (1903-1974), Stanford's first female professor of engineering, was internationally renowned for her many important contributions to aerodynamics and to automatic control theory. She made significant advancements in methods for the prediction of aerodynamic pressures on bodies, wings, and turbine blades, some of which were adopted as standard procedures throughout the world. In automatic control theory, she developed the first theory of discontinuous, or on-off, control systems. A professor of Applied Mechanics and of Aeronautics and Astronautics, emeritus, she was the first woman elected as a fellow by the American Institute of Aeronautics and Astronautics and received the Achievement Award from the Society of Women Engineers. She was also a senior member of the Institute of Electrical and Electronic Engineers, a member of Sigma Xi, and a member of the advisory boards of several scientific journals. Flügge-Lotz published more than 50 technical papers and wrote two books. She received a diploma of engineering and a doctor of engineering degree from Technische Hochschule in Hanover, Germany.