Android again was the dominant mobile operating system among U.S. mobile subscribers in the third quarter, while Apple was still the largest smartphone maker, Nielsen reported Tuesday.

All told, Android had 42.8% of the smartphone market, comprised of three major manufacturers: HTC (15%), Samsung (10.1%) and Motorola (10.4%) with 7.2% made by others.

Apple with its iPhone running iOS was well ahead of any single Android maker, with 28.3% of the market. Research in Motion, with its BlackBerry OS, has the second largest share at 17.8%. Microsoft 's Windows Mobile and Windows Phone 7 OSes took 6.1% across several device makers. Neilsen based its results on surveys of 22,200 U.S. mobile subscribers.

The combined Android and iPhone users made up 71% of the market. Nielsen found that the two groups downloaded 83% of all mobile apps downloaded in the prior 30 days.

Forty-four percent of all U.S. mobile phone users now have smartphones, Nielsen said. For the period of roughly the second quarter, Nielsen said 40% of mobile users owned smartphones and that 40% used Android, about 3 percentage points below the third-quarter result. In that second-quarter period, the iPhone had 28% of the market and the BlackBerry had 19%.

Matt Hamblen covers mobile and wireless, smartphones and other handhelds, and wireless networking for Computerworld. Follow Matt on Twitter at @matthamblen or subscribe to Matt's RSS feed . His e-mail address is [email protected] .

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