David R. Hanson was a Software Engineer at Google from 2004-12, a Senior Researcher at Microsoft Research from 1997-2004, and Professor of Computer Science at Princeton University from 1986-97. He has held faculty positions at Yale and the University of Arizona, and he was Dept. Head at Arizona from 1981-86. He has held visiting appointments at University of Utah, the Institute for Defense Analyses, Adobe Systems, and Digital's System Research Center. He was co-editor of Software—Practice and Experience from 1980-88 and continues to serve on its editorial board, and he is co-editor of the Princeton University Press Series in Computer Science. He has published many journal and conference papers and two books: A Retargetable C Compiler: Design and Implementation (with Chris Fraser), which describes lcc, a widely used compiler for Standard C, and C Interfaces and Implementations: Techniques for Creating Reusable Software. He received in his PhD in Computer Science in 1976 from the University of Arizona.