Much of Dr. Khargonekar’s early work was on new methods drawn from advanced algebra for analysis of system mathematical models. Later, he focused on the field of robust control, where he contributed to the development of state space H-infinity control theory, a major achievement in the field of control. He has also contributed to digital control, system identification, and digital signal processing. He has made pioneering contributions to the application of modern control methods to semiconductor chip manufacturing processes, particularly to plasma processes for etching silicon and other materials. Other applications include color xerography and control of reconfigurable manufacturing systems. In recent years, he has focused on the problem of integrating wind and solar electricity into the power grid. The challenge here is to deal with the inherent variability, unpredictability and uncontrollability of these electric energy sources. He is a contributor to three patents, two of which create methods of optimizing tone reproduction curves, an image rendering technique which has relevance to printing technologies. Colleagues at Xerox indicate that these patents are being used in current Xerox Corp. products.