John von Neumann was a Hungarian-American mathematician, physicist, and computer scientist, known for his foundational contributions to various fields, including game theory, quantum mechanics, and computer architecture. He played a crucial role in the development of the ENIAC, one of the first electronic general-purpose computers, and introduced the concept of the stored-program architecture, which is fundamental to modern computing. Von Neumann's work in game theory laid the groundwork for strategic decision-making in economics and social sciences. He also contributed to the Manhattan Project, which developed the first atomic bomb during World War II. His interdisciplinary approach has had a lasting impact on both science and technology.