1939
John Vincent Atanasoff, a professor of physics and mathematics at Iowa State College, and his graduate student Clifford Berry, create the Atanasoff-Berry Computer (ABC) with a grant of USD 650 at Iowa State University. The ABC computer is considered one of the earliest digital electronic computers and a milestone in the field of American computer science.
While the ABC is never fully operational or widely used, it introduced several key concepts that would become foundational in the development of modern computing.