American-Bulgarian physicist John Atanasoff dies
John Atanasoff was an American-Bulgarian physicist and inventor best known for inventing the first electronic digital computer. A professor at Iowa State University, Atanasoff worked with his graduate student, Clifford Berry, to build a machine known as the Atanasoff–Berry computer. It introduced the ideas of binary arithmetic, regenerative memory, and logic circuits. John Mauchly later used these concepts in the design of ENIAC.