WATERLOO, ONTARIO–(Marketwire -03/29/12)- Research In Motion Limited (RIM) (NASDAQ: RIMM – News )(TSX: RIM.TO – News ), a world leader in the mobile communications market, today reported fourth quarter results for the three months and fiscal year ended March 3, 2012 (all figures in U.S. dollars and U.S. GAAP, except where otherwise indicated).