Kiyosi Ito, 93, passed away on November 10, 2008. Ito was best known for the “Ito formula”, which is the foundation of stochastic calculus. His work had a profound impact on theoretical research in probability theory and applications, especially financial engineering. For more information, see the following article by J J O’Connor and E F Robertson: http://www-history.mcs.st-andrews.ac.uk/Biographies/Ito.html