PC shipments continued their steady growth in the second quarter, driven by sales outside the U.S., according to industry watchers.

Worldwide PC shipments grew by 13.3% year-over-year in the quarter to 42.8 million units, according to Gartner, a research firm. That's only slightly off the pace Gartner reported in the first quarter, when PC shipments grew by 13.4%, according to the firm.

Shipments in the U.S. grew at a slower rate than overall shipments. The U.S. market grew at an 11.4% clip in the second quarter, according to Gartner. In contrast, shipments in the Europe, Middle East and Africa region grew by 15.5%, and shipments in Latin America grew by more than 25%.

Much of the growth in shipments in the quarter was due to sales to corporations and businesses as opposed to consumers, according to Gartner.

"The PC market performed in line with expectations during the second quarter, exhibiting typical seasonal user demand patterns," Charles Smulders, vice president of Gartner's worldwide computing platforms group, said in a statement. "The professional market is crucial to the second quarter's overall results."

In a separate report, rival research firm IDC found higher global shipment growth, but a similar pattern. According to IDC, global PC shipments increased 15.5% in the quarter on an annual basis to 39.7 million units. But shipment growth inside the U.S. lagged behind the worldwide pace, coming in at 10.9%, according to IDC.

"Demand in Europe, supported by the strong Euro and aggressive promotions, was the biggest driver of the quarter," said Loren Loverde, director of IDC's worldwide quarterly PC tracker. "Overall growth remains solid and strength in Europe bodes well for the second half of the year."

As it did in the first quarter, Dell ( DELL) claimed the title of market share leader in both worldwide and U.S. shipments, according to Gartner. Dell shipped 7.1 million units worldwide in the second quarter, giving it a 16.5% share of the global market. The direct PC marketer had held a 29.5% share of the U.S. market, with 4.3 million units shipped.

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