Christiane Floyd (née Riedl; born 26 April 1943) is an Austrian computer scientist. In 1978, she became the first female professor of computer science in Germany, and was a pioneer of evolutionary participatory software design—a precursor to open-source software development. In 1973, she joined the Munich software development company Softlab, where she worked as a senior consultant and was involved in the development and demonstration of Maestro I, the first integrated development environment for software. She was married to Robert W. Floyd and Peter Naur—both computer scientists.