[4] Dán made significant contributions to the world of programming, including work on the Monte Carlo method, ENIAC, and MANIAC I.

[6][7][8] Her father had previously served in the Austro-Hungarian Army as an officer during World War I, and the family moved to Vienna to escape Béla Kun's Hungarian Soviet Republic.

[4] After their wedding, Dán and John von Neumann immigrated to the United States, where he held a professorship at Princeton University.

[5] In 1943, J. von Neumann moved to Los Alamos National Laboratory in New Mexico to work on calculations as part of the Manhattan Project.

[9] And so, after the war, Dán joined von Neumann in New Mexico to program the MANIAC I machine, which could store data, designed by her husband and Julian Bigelow.

This coding also required her to ask for sections of the machine to be rebuilt, as there was not a clear distinction between software and hardware at the time.

They were at a casino in Monte Carlo when Dán met her future husband, John von Neumann, for the first time.

He explained that he had perfected a way to ensure that you could win roulette every time, and promptly lost all his money trying to prove his point.

[5] With the start of World War II looming, Dán went back to Budapest to convince her parents and in-laws to leave the country.

[5] After John von Neumann's death, Dán married oceanographer and physicist Carl Eckart in 1958 and moved to La Jolla, California.

[7][19] Dán's step-daughter, Marina von Neumann Whitman, a prominent economist who is now retired, currently resides in Concord, Massachusetts.