The App Store has become an incredibly profitable venture for Apple, allowing the company to market its iPhone, iPad and iPod Touch based on third-party applications that can do anything from tuning a guitar to giving you up-to-the-second sports news. Of course, it’s a symbiotic relationship, as some developers are able to make a healthy living off sales from their mobile applications.

However, as late Apple founder Steve Jobs told his biographer before passing away earlier this month, the App Store was never in his plans for the company’s revolutionary line of mobile gadgets. Neither were third-party developers.

“Apple board member Art Levinson told Isaacson that he phoned Jobs ‘half a dozen times to lobby for the potential of the apps,’ but, according to Isaacson, ‘Jobs at first quashed the discussion, partly because he felt his team did not have the bandwidth to figure out all the complexities that would be involved in policing third-party app developers,” writes Walter Isaacson in the simply-titled Steve Jobs, which arrives on shelves Monday.

“The App Store came later and apparently as a reaction to jailbreakers and developer backlash,” writes Christian Zibreg for 9to5Mac. “The App Store nowadays is arguably the most vital app community on any platform.”