"American mathematician and businessman" . . . . "19th" . . "1955Z"^^ . . "1950Z"^^ . . . "William James Perry (born October 11, 1927) is an American mathematician, engineer, and businessman who was the United States Secretary of Defense from February 3, 1994, to January 23, 1997, under President Bill Clinton."@en . . . . . . . . . . . "William James Perry"@en . "Perry, William"@en . . "1927Z"^^ . "1927-10-11Z"^^ .