Apple's effect on the U.S. economy (vs competitors)

[azmba]

Hi all. Are there any data points to show how big of an impact Apple has on the U.S. economy? Logic alone tells me that Apple probably has a bigger positive impact on the American economy than its competitors (particularly foreign ones), but I am unable to find concrete data to corroborate my hypothesis. In fact I've encountered people who actually dispute that notion:

http://gizmodo.com/5873806/samsungs...ce-recognition-game?comment=45852293#comments

Any assistance is appreciated. Thanks.