Apple was founded in 1976 by Steve Jobs, Steve Wozniak, and Ronald Wayne. It introduced revolutionary products like the Apple I, Apple II, Macintosh, iPod, iPhone, and iPad that changed personal computing and popularized the graphical user interface. After struggling in the 1990s due to competition from Microsoft, Apple's fortunes changed with the iMac in 1998 and the introduction of the iPod, iTunes Store, iPhone, and App Store in the 2000s, making it one of the most valuable companies in the world today.