As Walter Isaacson explained in a 2013 article on the topic for the Harvard Gazette, Gates worked with such intensity for such lengths during this two-month stretch that he would often collapse into sleep on his keyboard in the middle of writing a line of code. He would then sleep for an hour or two, wake up, and pick up right where he left off—an ability that a still-impressed Paul Allen describes as “a prodigious feat of concentration.”
