Data collected by IDC indicates that the Mac has gained market share in worldwide PC shipments. Specifically, Apple's market share of worldwide PC shipments grew to 2.5% in Q2, up from 2.3% in Q1, notes research and investment firm PiperJaffray. "Apple's worldwide PC shipment market share over the last 2 years has been hovering in the 1.8%-2.3% range. We expect continued market-share gains through the back-half of CY05, as Apple benefits from carryover from the massive installed base of iPods during the back-to-school and holiday seasons." Mac market share increased 0.2% in each of the last 3 quarters. A continuation of 0.2% market share gains through the end of CY06 would lead to average CY06 Mac market share of 3.4%.