Mark your calendars because the iTunes Store has an anniversary coming up. Apple started selling music downloads on April 28, 2003--a business decision that seems to have worked out pretty well for the company considering that Apple has since sold more than 25 billion songs.Related StoriesData suggests 'phablets' are a fad, while mid-sized phones like Apple's iPhone see most usageLodsys sues iOS app developers over in-app purchasing patents
