Companies such as Boeing, Grumman, Raytheon and Lockheed Martin, which make much or all of their revenues from defence, are rapidly building capabilities in cyberspace, buying software companies that can degrade or destroy a computer network, or protect it from such attacks.
“The internet is turning the defence industry on its head, just as it transformed media, retail and other sectors.”
http://www.ft.com/cms/s/0/84697a96-b834-11e0-8d23-00144feabdc0.html