The North Korean government appears to have developed its own graphical Linux-based "Red Star" operating system, though its people still prefer that symbol of Yankee high-tech imperialism, Microsoft Windows. That's according to the blog of a Russian college student, 'Mikhail,' studying at a university in North Korea's capital city, Pyongyang. According to translations of the blog by Russian satellite news channel, Russia Today, as well as Google's Translate tool, installation DVDs of Red Star can be freely purchased in Pyongyang for $5 and come in both client and server versions.