The password "Dashwood" is a reference to the protagonist of Jane Austen's "Sense and Sensibility" and it serves as a parallel between the novel's conflict between sense (logic, propriety, and thoughtfulness) and sensibility (emotion, passion, unthinking action) and Harold's internal conflict between letting the ASI's "live" (sense) or letting Humanity fend for itself (sensibility), opting for the latter in the end. Also, the book is the one that he used to propose to Grace back in the day, which makes it even more meaningful. -- POI S05E12