Clifford Berry was an American physicist and engineer born in Iowa in 1918. He graduated in electrical engineering in 1939 and worked with John Atanasoff on the ABC. He helped build the working test model of 1939. The larger machine was intended for systems of linear equations, rather than arbitrary tasks run from a stored program. After his physics master’s degree in 1941, Berry moved to a job in California. He earned a doctorate in 1948 and continued research in mass spectrometry, a method of distinguishing particles by mass and electric charge. He died in 1963. His name remains in the joint title Atanasoff–Berry Computer.
History of Bulgaria
