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The first iPad users were the Apple team who developed it.
An apple tax is a price premium paid by Apple Macintosh users over that of a Windows user.
Apple users can use Aperture for there photography needs.
Apple does allow remote help for its users by running SSH, which is a secure shell, to log in to the system. The Apple Remote Desktop allows all this to happen.
That is impossible to answer. As of 2012 Apple has about 15% of the computer market share.
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You can download it on your phone on Play Store for Android/Smartphone users or on App Store for Apple users.
One can get an Apple Developer connection by signing up for the Apple Development Program. This program allows for users to develop apps and software for Apple products.
Apple is re-buying the used iPhones because it intends to encourage the users to acquire the new Apple iPhones.
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As was shown at Apple's WWDC 2010 opening keynote, yes, but you would need to have a lot of users.
If you look at the attached link, you will see that Amazon is the most popular retail website in the United States with approximately 100 million monthly users. Apple, Walmart and Netflix follow behind by some considerable distance.