“Growth in Apple’s personal computer business continued to outpace the industry average last month, with Macs accounting for a 14 percent unit share and 25 percent dollar share of all US-based PC retail sales, according to market research firm NPD,” Katie Marsal reports for AppleInsider.

“The results — first revealed in an investor note from Pacific Crest Securities analyst Andy Hargreaves on Monday — represent 60 percent unit growth and 67 percent revenue growth over the same period one year ago. At the same time, overall US PC retail shipments grew just 9 percent on a 5 percent increase in revenues,” Marsal reports.

Marsal reports, “Apple saw particular strength in notebook systems, which rose 64 percent in units and 67 percent in revenues, suggesting strong sell-through of the company’s new MacBook Air, noted Hargreaves. ‘Macbook Air sales appear to be additive to total sales, rather than replacing Macbook Pro sales,’ he said. ‘We believe a new set of corporate customers make up a meaningful portion of MacBook Air buyers.'”

“Overall, the US retail segment combined for a 20 percent increase in notebook shipments on an 11 percent rise in revenues,” Marsal reports.

“The Mac maker also saw robust demand for its desktop systems, which grew 55 percent on a 68 percent increase in revenues, compared to the overall retail segment which saw unit sales decline 5 percent on a 2 percent drop in revenues,” Marsal reports.

More in the full article, including market share chart and iPod info here.