A few key quotes from the article

"The recently introduced 21-inch iMac was the top-selling desktop for the month, Stephen Baker, NPD's vice president of industry analysis, said in an interview. Apple's high-end iMac 27-inch model took the No. 3 spot in the desktop category, he said."

"The company also took the top spot in the notebook category in October, with the $1,199 MacBook Pro, Baker said. Overall, Apple took 4 out of the top 10 positions for notebooks in U.S. retail for the month, according to Baker. In addition to the top-seeded MacBook Pro, Apple also secured the 8, 9, and 10 positions."

Note that NPD data only encompasses online and retail stores, not direct sales.

You can read the entire article here.