CHATSWORTH, Calif.--(BUSINESS WIRE)--IRIS INTERNATIONAL, INC. (NASDAQ: IRIS), today announced record fourth quarter 2008 revenue of $26.7 million, an increase of 22% over revenue of $21.9 million in the fourth quarter of 2007, and record full year revenue of $95.5 million for the year ended Dec. 31, 2008, a 13% increase over revenue of $84.3 million for fiscal 2007.