John von Neumann: Computing's Cold Warrior

Virtually all computers today, from $10 million supercomputers to the tiny chips that power cell phones and Furbies, have one thing in common: they are all "Von Neumann machines," variations on the basic computer architecture that John von Neumann, building on the work of Alan Turing, laid out in the 1940s. Men have become famous for less. But in the lifetime of this Hungarian-born mathematician who had his hand in everything from quantum physics to U.S. policy during the cold war, the Von Neumann machine was almost the least of his accomplishments.

Born to prosperous Jewish parents in Budapest in 1903, Von Neumann was a child prodigy who could divide eight-digit numbers in his head by age six, learned calculus by age eight and amused his parents' friends by glancing at a phone book and reciting whole pages verbatim. Mathematics quickly became the focus of his studies, culminating in a Ph.D. from the University of Budapest at the age of 23.

After immigrating to the U.S. in 1933, Von Neumann was hired, along with Albert Einstein, by the newly formed Institute for Advanced Study in Princeton, N.J., a nonprofit research institute set up by the Bamberger family with profits from their department stores. The I.A.S. proved to be the perfect intellectual playground for Von Neumann's boundless genius. He threw himself with enthusiasm into one intractable problem after another, ranging from the abstract mathematics of quantum mechanics to the practical problems of weather prediction, hydrology and the patterns of artillery fire.

Was there a mathematical structure behind parlor games like chess and poker? Von Neumann investigated and in the process invented game theory--a branch of mathematics that has brought new insights to fields as diverse as economics and evolutionary theory. The 1997 Nobel Prize in Economics was awarded to game theorists, the seventh Nobel Prize that grew out of Von Neumann's ideas.

With the onset of World War II, Von Neumann was recruited for the Manhattan Project and played a role in building both the A-bomb and the H-bomb. His main contribution was supervising the vast and complex mathematical calculations--done first by hand and later by primitive electronic computers--required to design the bombs.

After the war, he returned to the I.A.S. and became obsessed with computing. Von Neumann's vision for the machines went beyond the rote arithmetic tasks for which they were originally designed. In his idealized computer, the same memory units that held data items, such as numbers or text, also held the step-by-step instructions that would allow the machine to be programmed to perform any task. Von Neumann persuaded the I.A.S.'s somewhat skeptical board of trustees to allocate $100,000--quite a sum in 1945--to build the MANIAC, the first in a series of early Von Neumann machines that included the JOHNNIAC (at Argonne National Laboratory) and the IBM 701, one of the progenitors of IBM's enormously profitable mainframe lines.