John. 1903–57, US mathematician, born in Hungary. He formulated game theory and contributed to the development of the atomic bomb and to the development of the stored-program computer (von Neumann machine)
(noi'män') Hungarian-born American mathematician who contributed to mathematical theories about numbers and games. He was a leader in the design and development of high-speed electronic computers and also contributed to the field of cybernetics, a term he coined.