Apple's iconic iPad
Three years ago, Apple unveiled the first iPad, which had a bigger impact than anyone could have imagined. PC and laptop sales have been dropping, and for the first couple of years, sales of iPads regularly eclipsed the most optimistic estimates.
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Apple CEO Steve Jobs speaks about a new case protector during an Apple event to unveil the iPad 2 at the Yerba Buena Center for the Arts on March 2, 2011, in San Francisco.