STAMFORD, Conn.--(BUSINESS WIRE)--Worldwide PC shipments totaled 83.7 million units in the fourth quarter of 2014, a 1 percent increase from the fourth quarter of 2013, according to preliminary results by Gartner, Inc. These results indicate a slow, but consistent improvement following more than two years of decline. "The PC market is quietly stabilizing after the installed base reduction driven by users diversifying their device portfolios. Installed base PC displacement by tablets peaked in 2