One of the most common uses for a smartphone is as a camera or video camera. Just look at the phenomenal success of Instagram, Flickr, and Vine. The iPhone is the most-used camera in the world. It's not that the smartphone is a better camera than a DSLR, or even a traditional point-and-shoot—in fact most pale in comparison. It's simply a matter of convenience because most people have their smartphone with them everywhere they go, and don't carry a camera around unless they know they need to.
So, have fun using your PCED, or getting work done while on the go from your MPC. I was trying to stay focused on functions with some intrinsic value for business users, so I didn't even cover the fact that you can watch Netflix, read a book, or play Angry Birds as well. Oh, and don't forget it can also make phone calls if you're into that sort of thing.
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