If you take a rigorous view of the question (and don't, for example, take some early COBOL test code and run it on an emulator) the actual answer is probably some old control code operating an industrial servo motor. Or similar.

Windows 3.1 Font Dialog Still in Vista.

Win 3.1 was released in 1992, yikes!

http://bink.nu/photos/news_article_images/images/13552/origi...

The simulation that we are all living in.

I heard from a buddy who worked on IE7 while he was a summer intern that the IE team still had code from IE 1.0 sticking around.

The space shuttle and Nasa command center

Hammurabi's