Klára Dán von Neumann died #OTD in 1963.
Hungarian mathematician, self-taught engineer and computer scientist, noted as one of the first computer programmers. She was the first woman to execute modern-style code on a computer. Klára made significant contributions to the world of programming, including work on the Monte Carlo method, ENIAC, and MANIAC I. She was introduced to a lot of her work through her husband, John von Neumann. via @wikipedia