Chairman and CEO, Apple
During the first two decades of his remarkable 30-year career, the Apple Inc. founder twice altered the direction of the computer industry. In 1977 the Apple II kicked off the PC era, and the graphical user interface launched by Macintosh in 1984 has been aped by every other computer since. Along the way Jobs conceived of "desktop publishing," gave the world the laser printer, and pioneered personal computer networks. As a side gig he bankrolled Pixar, which fostered the development of the technology and a brand-new business model for creating computer-animated feature films.
Since returning to Apple in 1997, he has changed the dynamics of consumer electronics with the iPod, and persuaded the music industry, the television networks, and Hollywood to distribute their wares with the iTunes Music Store. With his hugely successful Apple Stores, he gave the big-box boys a lesson in high-margin, high-touch retailing. And this year, at the height of his creative and promotional powers, Jobs orchestrated Apple's entry into the cellular telephone business with the iPhone.
That's five industries that Jobs has upended - computers, Hollywood, music, retailing, and wireless phones. At this moment, no one has more influence over a broader swath of business than Jobs.