Harry Lewis is Gordon McKay Research Professor of Computer Science in the Harvard John A. Paulson School of Engineering and Applied Sciences. His edited collection of classic computer science papers, Ideas that Created the Future (MIT Press), includes Ada’s writings on the Analytical Engine; his edition (with Lloyd Strickland) of Gottfried Leibniz’s writings on binary arithmetic, Leibniz on Binary, will be published by MIT Press October 25, 2022. Lewis started teaching computer science at Harvard in 1974, and his students have included both Bill Gates and Mark Zuckerberg. For eight years he served as Dean of Harvard College, and for half a year as interim Dean of the School of Engineering and Applied Sciences.