They were hackers. They were young men and women, mostly in their twenties. The ones in their thirties were considered old. They did all the things hackers do: working all night, living for their code, arguing over whether a problem was due to software or hardware. They kept logbooks where they left notes telling the next shift what they had done, and they filled them with dark nerd humor, the same sort of sarcastic jokes you find on email and comment threads today.
Wired hat den Technik-Historiker George Dyson interviewt. Über die Anfänge von Computern, Turing, von Neumann & Co. Extrem interessant und lesenswert.