Most folks associate it with the movie series Terminator.
http://en.wikipedia.org/wiki/Skynet_%28Terminator%29 : Skynet is a fictional, self-aware artificial intelligence system which features centrally in the Terminator franchise and serves as the franchise's main antagonist ... with its ultimate goal the extinction of the human race ... Skynet was [originally] a computer system developed for the U.S. military by the defense firm Cyberdyne Systems.
http://en.wikipedia.org/wiki/Skynet_%28Terminator%29 : Skynet is a fictional, self-aware artificial intelligence system which features centrally in the Terminator franchise and serves as the franchise's main antagonist ... with its ultimate goal the extinction of the human race ... Skynet was [originally] a computer system developed for the U.S. military by the defense firm Cyberdyne Systems.
EDIT: whoosh