After the Civil War he owned the largest iron and steel works in America.
Carnegie Steel was founded in 1892 when Andrew's various steel mills were merged together. http://www.spartacus.schoolnet.co.uk/USAcarnegie.htm
He didn't have middle name, if you still want the answer then Mr. Andrew Carnegie
Andrew Carnegie's monopoly was on steel.
i believe that he attended Adam State College. i have done my research on Andrew Carnegie and i am fairly positive of this answer.