The software platform behindApple's iPhone, iPod Touch and iPad is called iOS. On their conference call Tuesday night, Apple noted that combined sales of all iOS devices worldwide exceeded 160 million units in 2010. The total of such devices sold in the most recent quarter was 40 million units.

Chief operating officer Tim Cook noted that Apple's "integrated approach" is superior to that of the competition and "takes out all of the complexity for the end user." Apple is integrating key ideas, if not technologies, from iOS into its next Mac OS X version, which is due later this year.