At certain points of the show, code is scrolled across the screen. The code that's displayed on computer screens appear to be authentic code.

In chapter 21 of the second DVD, a minor character, wearing virtual reality gear, is walking around the streets. A false colorized view of what's in front of him is displayed in his goggles along with some computer code scrolling in the foreground. A closer examination of the code, using your friendly pause button, will reveal that the code is actully in Perl! Not only that, the program is actually a CGI script. HTML is easily discernable and so are lines like:

$host = $ENV{'REMOTE_HOST'};
$addr = $ENV{'REMOTE_ADDR'};
as well as several lines of regular expressions.

I was actually, very briefly, tempted to copy down the code and run it.