Now Playing: 03-12-12 Marketplace Tech Report

Before there was Marc Zuckerberg, before there was Steve Jobs, before there was Bill Gates, there was Alan Turing. Turing was a British mathematician and logician, and he had some ideas about computers. "The entire digital world we live in can be traced in large part to his ideas," says George Dyson, author of "Turing's Cathedral: The Origins of the Digital Universe." Also, another edition of Robot Roundup.