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Steve Jobs began planning the iPhone.
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IOS 1
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Jobs' reasoning was that developers could build web applications through the Safari web browser that "would behave like native apps on the iPhone".[
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Apple announced the iPod Touch
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The operating system was unveiled with the iPhone at the Macworld Conference & Expo.
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IOS 2
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The iOS App Store was opened
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Apple announced that a native Software Development Kit (SDK)
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IOS 3
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IOS 4
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Apple introduced their much-anticipated media tablet, the iPad,
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IOS 5
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IOS 6
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IOS 7
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IOS 8