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Hewlett-Packard once again led U.S. and worldwide PC shipments in the first quarter of 2010, but it was the performance of a number of Asian OEMs that called for attention.

While HP, Acer and Dell remained the top three market-share holders, Lenovo and Toshiba each posted significant growth, and Asus, for the first time, broke into the top five.

On April 14 research firms Gartner and IDC posted preliminary PC shipment results for the quarter, which surpassed expectations. According to Gartner, shipments totaled 84.3 million units — an increase of 27.4 percent, versus the 22 percent Gartner predicted.