North Korea is undergoing its own digital revolution, even as it grapples with chronic shortages of food and fuel. It is still among the most isolated of nations, with cyberspace policies considered among the most restrictive in the world. Yet inside Pyongyang, there's a small but growing digital world, and a whole new vocabulary to go with it: CNC, e-libraries, IT, an operating system called Red Star and a Web portal called Naenara.