In the Social Network DVD commentary extras you can see the monitors with a green screen. All computer scenes have been edited in post production. You can chec

In the Social Network DVD commentary extras you can see the monitors with a green screen. All computer scenes have been edited in post production. You can check the Full HD version, frame by frame and read real perl code and shell commands like wget. The screenplay even is based 1:1 on the real blog posts of Zuckerberg (except the girls name). I wonder if they were able to reuse Facebook website design by using archive.org. Shortly after the movie was released Facebook changed the robots.txt to disallow and prevent archive.org. But there are some minor errors. Like later in the movie somehow Zuckerbergs PC runs Windows XP instead of Linux. And in one short scene the Windows XP screen is not completely visible, the right side is cut of (like the clock of the taskbar).