In 1996, the search engine fit on a computer in co-founder Larry Page’s dorm room. Four years later, no terrestrial supercomputer could run it. Google’s inadequate hardware required unique code that tolerated glitches and kept running. The authors of these robust combos of 0s and 1s, Jeff Dean and Sanjay Ghemawat, put in some 90 hours a week, plugging holes and correcting weaknesses in the already unparalleled search engine. Nearly 20 years later, the friendship endures, with the two still working out bugs at the same keyboard.