As a young man he dabbled in counterculture. In 1974, Jobs spent his savings from working at Atari to travel to India, where he sought spiritual enlightenment. He also dated folk music icon Joan Baez in his 20s. He preferred to wear informal attire to work and his favorite musician was Bob Dylan.

Wozniak and Jobs became friends after meeting at Hewlett-Packard in 1971. In 1976, they built the Apple I computer in Wozniak's parents' garage after raising $1,750 -- for which Jobs sold his Volkswagen minibus, and Wozniak his HP scientific calculator.

In 1976, the duo founded Apple Computer Co., named after Jobs had spent a summer working at an Oregon orchard. The company changed its name to Apple Computer Inc. a year later. Apple's second PC, the Apple II, was a success, recording sales of $139 million from 1977-1979.

Apple's introduction of the Macintosh in 1984 introduced the graphical user interface to mainstream desktop computing. The Mac ran on a 32-bit processor (compared to 16-bit processors for other PCs at the time) and had 128K bytes of memory, expandable to 192K bytes. It was an immediate success: more than 400,000 Macintosh computers were sold in the first year.

In 1985, Jobs and John Sculley, Apple's president and CEO at the time, clashed over differences about running the company, resulting in Jobs being ousted. He left the company he had co-founded with a net worth of $150 million and started his next venture, Next Computer, which was only moderately successful but planted the seeds for future Apple hardware and software.