|2008 Christmas Special|
|Date||Dec. 24th 2008|
2008 Christmas Special is the 521st xkcd comic.
"'How could you possibly think typing 'import skynet' was a good idea?'"
This is a reference to the popular coding language python, which has a simple command "import". In the comic, this command allowed a coder to make the system sentient, as in the Terminator movies, from which skynet originated.