A Gartner Research study of July-September sales data
found that Microsoft's mobile OS outsold Palm's. During that period, Microsoft's OS accounted for 48.1% of worldwide shipments of PDAs, up from 41.2% the previous year. Palm's share dropped to 29.8% in Q3 2004 from 46.9%. The BlackBerry quadrupled its market share in twelve months to 19.8% from 4.9%.