Possible Clues:

• ''Winner'' in a famous 1948 headline
• Decimal cataloguing system used by libraries
• Whom Truman defeated for president
• Backward solver married an American philosopher
• '___ Defeats Truman' (infamous 1948 headline)
• His decimal system sounds a bit wet!
• Surprise loser of 1948
• ''Winner'' in an infamous headline
• ___ decimal system
• Creator of a decimal system